People have been killed by those things and even though I had done them without a cage the place I worked had one and a real long air chuck so you didn't have to put any part of you in the cage with it.
I have never had one come loose even when I put them in the cage, because if you pay attention to how the ring is centered and where it's ends are you pretty much got it.
Still always squatted down low beside them airing them up though. :D
