Private game playing in a laser tag arena, someone was using subpar ammunition and his gun got "stuck" in full auto as I was coming round the corner. Received a 3 second burst into my lower face mask, which would've been fine except the subpar bb's shattered and retained enough velocity passing through the mesh to wipe out half the teeth on my lower jaw. £600 dentist bill, which he graciously paid (well if he hadn't i'd probably have broken something of him >.> ) and he owes me pints for life.