And you, sir, are punny!

Can I have your mask when (not if!) you die??

Rustyolddude wrote:a portion of it goes back down the hose against the forward flow.

Not of the valve is working correctly. Except for what tiny bit isn't flushed out of the mask's volume, it will all go out the vent. It would take Superman to force any down the hose against the flow...

We hosted an exchange student from Ecuador when our son was in high school. As much as it benefited Ernesto, we still think our entire family learned as much--if not more--in the cultural exchange. The two boys kept in touch thru the rest of HS, but the letters waned during college. I don't think ou...