This one is a little different: On the grenade range; Ft. Knox early 70's. On the throwing line there were 6x6 concrete boxes with 3 foot high walls. When it was your turn to throw you were accompanied by a DI. When this guy next to me pulled the pin the top/safety came off, The DI jumped the wall and left the guy holding the grenade. For what ever reason the guy leaned forward and dropped the grenade over the wall. They said it blew up before it hit the ground. Very lucky guy. The DI never returned...