Gary Boggs wrote:

And about the M&H system, I use the cannula but you have to be very careful
that you don't take any breaths through you mouth. I've heard of some guys
holding a mouthful of water to make sure they don't.

This is not allowed above 0°C level (water could freeze)



--
Denis

R. Parce que ça rompt le cours normal de la conversation !!!
Q. Pourquoi ne faut-il pas répondre au-dessus de la question ?