"I looked at the portal that loomed below me. It was a portal to nothingness, a portal to the End.
I checked my inventory. everything was still there: my diamond sword, pick, armor,ladders, bow and arrow, and 11 blocks of TNT. I glanced back at the hallway leading away from me. No mobs in sight, none that would follow me in the portal. Then, I jumped in. The next thing I knew I was standing on an obsidian square 10 meters (10 blocks) from the actuall island. I had just enough TNT to build a pathway across. So I began making my way across when I felt my stomach drop... litterally. The Enderdragon had pushed me off my platform and into the void. All my items were gone..."
- A tragic (but true) tale of me
This is an example of why the Enderdragon should be summoned, not spawned normally. You could summon him the original way (in the snapshots), by blocking with a golden sword. This would also allow you to fight it multiple times. However, the ender crystals should be spawned when the Enderdragon is summoned. The Enderdragon should be summoned to fight multiple times and to prevent my tragic tale of fighting the Enderdragon.