Haha! Did you know that the mind trick can go past level 3?
Again, it looks like the clever, clever people at Raven have left in another little golden nugget!
First enable cheats in a single player map, beit "devmap" or however you do it.
Then type "SetForceAll 5".
When you next use the Jedi Mind Trick on a weak minded NPC you'll be able to completely mind control them and walk around in their bodies, force them to commit suicide by jumping off high platforms, shoot at their friends, run round in circles, etc...
You can almost see the confusion on the other NPC's faces as their friends turn into mindless lemmings.