Spot on! Calculated this myself a while ago, was planning on making a 1:1 life-sized creeper. Didn't end up doing it. 'Twould have been great fun - placing it on a friend's doorstep, knocking, then running and hiding behind some bushes. Add a little speaker setup inside to make it hiss...
I have a decompile error that goes like this:
== MCP 8.09 (data: 8.11, client: 1.6.4, server: 1.6.4) ==
"scalac" is not found on the PATH. Scala files will not be recompiled
# found ff, ff patches, srgs, name csvs, doc csvs, param csvs, astyle, astyle co
nfig, rg, ss
== Decompiling client using fernflower ==
> Creating SRGs
> Applying SpecialSource
> Applying MCInjector
> Filtering classes
> Decompiling
> Unpacking jar
> Copying sources
> Applying fernflower fixes
> Applying patches
> Cleaning comments
- Done in 367.33 seconds
== Reformating client ==
> Cleaning sources
> Replacing OpenGL constants
> Reformating sources
- Done in 82.27 seconds
== Updating client ==
> Adding javadoc
> Renaming sources
- Done in 85.19 seconds
!! Missing server jar file. Aborting !!
== Recompiling client ==
> Cleaning bin
> Recompiling
'"C:\Program Files\Java\jdk1.7.0_45\bin\javac" -encoding UTF-8 -Xlint:-options -
deprecation -g -source 1.6 -target 1.6 -classpath "jars\versions\1.6.4\1.6.4.jar
;lib;lib\*;jars\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;jars\lib
raries\org\lwjgl\lwjgl\lwjgl-platform\2.9.0\lwjgl-platform-2.9.0-natives-windows
.jar;jars\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;j
ars\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.
jar;jars\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;jars\l
ibraries\com\google\guava\guava\14.0\guava-14.0.jar;jars\libraries\lzma\lzma\0.0
.1\lzma-0.0.1.jar;jars\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-
20101023.jar;jars\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-
1.47.jar;jars\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.
jar;jars\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-
20100824.jar;jars\libraries\org\scala-lang\scala-library\2.10.2\scala-library-2.
10.2.jar;jars\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;ja
rs\libraries\org\scala-lang\scala-compiler\2.10.2\scala-compiler-2.10.2.jar;jars
\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;jars\libraries\org\ow2\
asm\asm-debug-all\4.1\asm-debug-all-4.1.jar;jars\libraries\org\lwjgl\lwjgl\lwjgl
\2.9.0\lwjgl-2.9.0.jar;jars\libraries\commons-io\commons-io\2.4\commons-io-2.4.j
ar;jars\libraries\net\sourceforge\argo\argo\2.25\argo-2.25.jar;jars\libraries\co
m\google\code\gson\gson\2.2.2\gson-2.2.2.jar;jars\libraries\com\paulscode\codecw
av\20101023\codecwav-20101023.jar;jars\libraries\net\java\jinput\jinput-platform
\2.0.5\jinput-platform-2.0.5-natives-windows.jar;jars\libraries\net\minecraft\la
unchwrapper\1.8\launchwrapper-1.8.jar" -sourcepath src\minecraft -d bin\minecraf
t @"c:\users\maxwell\appdata\local\temp\java_src_path_vrnppk.txt"' failed : 1
== ERRORS FOUND in JAVA CODE ==
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\util\ChatMessageComponent
.java:268: warning: non-varargs call of varargs method with inexact argument typ
e for last parameter;
var7.append(StatCollector.translateToLocalFormatted(this.transla
tionKey, var13));
^
cast to Object for a varargs call
cast to Object[] for a non-varargs call and to suppress this warning
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\client\gui\LoadingScreenR
enderer.java:52: error: running is not public in Minecraft; cannot be accessed f
rom outside package
if (!this.mc.running)
^
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\client\gui\LoadingScreenR
enderer.java:77: error: running is not public in Minecraft; cannot be accessed f
rom outside package
if (!this.mc.running)
^
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\client\gui\LoadingScreenR
enderer.java:98: error: running is not public in Minecraft; cannot be accessed f
rom outside package
if (!this.mc.running)
^
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\world\gen\feature\MapGenS
catteredFeature.java:113: error: components has protected access in StructureSta
rt
if (var4 != null && var4 instanceof StructureScatteredFeatureStart && !v
ar4.components.isEmpty())
^
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\world\gen\feature\MapGenS
catteredFeature.java:115: error: components has protected access in StructureSta
rt
StructureComponent var5 = (StructureComponent)var4.components.getFir
st();
^
5 errors
1 warning
==================
Initial client recompile failed, correct source then run updatemd5
Press any key to continue . . .
0
0
0
== MCP 8.09 (data: 8.11, client: 1.6.4, server: 1.6.4) ==
"scalac" is not found on the PATH. Scala files will not be recompiled
# found ff, ff patches, srgs, name csvs, doc csvs, param csvs, astyle, astyle co
nfig, rg, ss
== Decompiling client using fernflower ==
> Creating SRGs
> Applying SpecialSource
> Applying MCInjector
> Filtering classes
> Decompiling
> Unpacking jar
> Copying sources
> Applying fernflower fixes
> Applying patches
> Cleaning comments
- Done in 367.33 seconds
== Reformating client ==
> Cleaning sources
> Replacing OpenGL constants
> Reformating sources
- Done in 82.27 seconds
== Updating client ==
> Adding javadoc
> Renaming sources
- Done in 85.19 seconds
!! Missing server jar file. Aborting !!
== Recompiling client ==
> Cleaning bin
> Recompiling
'"C:\Program Files\Java\jdk1.7.0_45\bin\javac" -encoding UTF-8 -Xlint:-options -
deprecation -g -source 1.6 -target 1.6 -classpath "jars\versions\1.6.4\1.6.4.jar
;lib;lib\*;jars\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;jars\lib
raries\org\lwjgl\lwjgl\lwjgl-platform\2.9.0\lwjgl-platform-2.9.0-natives-windows
.jar;jars\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;j
ars\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.
jar;jars\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;jars\l
ibraries\com\google\guava\guava\14.0\guava-14.0.jar;jars\libraries\lzma\lzma\0.0
.1\lzma-0.0.1.jar;jars\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-
20101023.jar;jars\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-
1.47.jar;jars\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.
jar;jars\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-
20100824.jar;jars\libraries\org\scala-lang\scala-library\2.10.2\scala-library-2.
10.2.jar;jars\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;ja
rs\libraries\org\scala-lang\scala-compiler\2.10.2\scala-compiler-2.10.2.jar;jars
\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;jars\libraries\org\ow2\
asm\asm-debug-all\4.1\asm-debug-all-4.1.jar;jars\libraries\org\lwjgl\lwjgl\lwjgl
\2.9.0\lwjgl-2.9.0.jar;jars\libraries\commons-io\commons-io\2.4\commons-io-2.4.j
ar;jars\libraries\net\sourceforge\argo\argo\2.25\argo-2.25.jar;jars\libraries\co
m\google\code\gson\gson\2.2.2\gson-2.2.2.jar;jars\libraries\com\paulscode\codecw
av\20101023\codecwav-20101023.jar;jars\libraries\net\java\jinput\jinput-platform
\2.0.5\jinput-platform-2.0.5-natives-windows.jar;jars\libraries\net\minecraft\la
unchwrapper\1.8\launchwrapper-1.8.jar" -sourcepath src\minecraft -d bin\minecraf
t @"c:\users\maxwell\appdata\local\temp\java_src_path_vrnppk.txt"' failed : 1
== ERRORS FOUND in JAVA CODE ==
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\util\ChatMessageComponent
.java:268: warning: non-varargs call of varargs method with inexact argument typ
e for last parameter;
var7.append(StatCollector.translateToLocalFormatted(this.transla
tionKey, var13));
^
cast to Object for a varargs call
cast to Object[] for a non-varargs call and to suppress this warning
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\client\gui\LoadingScreenR
enderer.java:52: error: running is not public in Minecraft; cannot be accessed f
rom outside package
if (!this.mc.running)
^
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\client\gui\LoadingScreenR
enderer.java:77: error: running is not public in Minecraft; cannot be accessed f
rom outside package
if (!this.mc.running)
^
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\client\gui\LoadingScreenR
enderer.java:98: error: running is not public in Minecraft; cannot be accessed f
rom outside package
if (!this.mc.running)
^
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\world\gen\feature\MapGenS
catteredFeature.java:113: error: components has protected access in StructureSta
rt
if (var4 != null && var4 instanceof StructureScatteredFeatureStart && !v
ar4.components.isEmpty())
^
C:\Pylo\MCreator\forge\mcp\src\minecraft\net\minecraft\world\gen\feature\MapGenS
catteredFeature.java:115: error: components has protected access in StructureSta
rt
StructureComponent var5 = (StructureComponent)var4.components.getFir
st();
^
5 errors
1 warning
==================
Initial client recompile failed, correct source then run updatemd5
Press any key to continue . . .