muduckace: firstly I'm trying to decypher your code name and failed. Secondly, this was often a curiosity in the bar as to whether it would work as a get you out of jail technique in some unsavoury dump. But surely, it would give a very hot start blowing large quantaties of hot air down the throat of a healthy colleague. A bit like a few C.P's I've known. Sent we into a red flush rage (inside) a few times.