Originally Posted by C-10
...You could try not breathing...
Actually I don't need to quit breathing altogether. I only need to refrain from exhaling. The inhale part of it doesn't cause any problem at all.
I'm heading out to the shop to try it now. If I don't post my findings in the next hour or so...send the EMTs.
(And thanks to the rest of you for the great suggestions. Lots of good options. C-10...you're grounded from now until the Prom.)