This footage from Guangdong province, China, shows an army recruit learning how to throw a grenade. Summation: he sucks at it.
Instead of throwing the grenade over a protective wall, he drops it just a few feet away from where he and his instructor are standing.
The instructor, noting the problem, dives for a trench, pulling the recruit in with him. They both survive, apparently unharmed.
-via Daily Telegraph (warning: auto-start video)