Smaller scale but similar concept, had things go a bit wrong with an M67 Fragmentation Grenade on a live fire section attack range, a grenade came to rest 3m (12ft) from my position. It was flat ground with no cover, no choice but to stay flat and hope for the best, after what seemed like and eternity, the grenade detonated and the shockwave rolled past. No injury to me, I wasn't in the cone of fragmentation even though I was well inside the 5m killing radius of the grenade.