Comments on other threads have got me wondering; what, if any, kit failures have you had? Were they life threatening or merely an inconvenience? Maybe we'll see a pattern emerging with a particular piece of kit or set-up. For the purpose of the thread, let's try and keep it to failures which have either happened directly to you or to your buddy while you were on the same dive and you witnessed Personally, I've had twist-type back-up torches flood twice. So I now only use sealed magnetic switch torches as back-ups which don't involve me turning against o-rings. Not life threatening at the time as it was in good vis and light and I was just poking about under rocks, but enough that it has persuaded me to think twice about that style of torch.