Well if real ninjas can do that in their sleep it must be very awkward when they wake up the next morning over the body of somebody they just killed. lol
Chicken <-- Egg <-- Rocket Powered Fist Take that, science!
For according to the trollish philosopher Plateau, "if you wants to understan' an enemy, you gotta walk a mile in his shoes. Den, if he's still your enemy, at least you're a mile away and he's got no shoes." — A Blink of the Screen by Terry Pratchett