Ok, so i have been working on a world for a while now. My friend came on recently and got me into an infinite death loop. He put a command block and typed @a. He then set the command block on repeat and put a lever down next to it. He flicked the lever and now i'm in an infinite death loop. Whenever I log onto the world I die instantly and when I respawn i get killed again, and again, and again... Do you know how I can fix this or turn command blocks off? I've tried NBTExplorer but it didn't work.