How to be an enderman... and other mobs...
WARNING!: This command may only be on 1.8 update!
1. Hook this command up to a clock
2. The command block clock command is /setblock ~ ~ ~1 minecraft:redstone_block 0 destroy Then place a torch next to it where the block is placed...
3. Then on the other side of the command block and redstone block place another command block with the command /tp @e [Mob]
4. you might also want to hook up another command block with invulnerable command on it.
5. lastly... drink an invisibility potion... AND GO TROLL YOUR FRIENDS LOL!