Bombs and Shields
The group spread out around the room. Each person chooses another person without making their choice known; that person is their Bomb. Then choose another person - that one is their shield. The aim of the game is to keep your shield between yourself and your bomb.
There will be a lot of frantic movement to begin with, and the facilitator can count down from 10 to 1 as the bomb is about to explode. On the command freeze, the facilitator goes around the group asking if people managed to keep their shield between themselves and their bomb.