I had the exact same though - this could make the suits a reality - providing that the traveller does not need to take large doses of morphine to deal with the pain or are dosed with amyl nitrite.
I bet you would be "gassy" for weeks on end - with a dangerous combination of both pure oxygen and methane - sounds like a party to me.
I'm guessing, with the reference to amyl nitrate, they are assuming that whatever is stuck up your ass to facilitate this breathing process, is going to hurt.
I bet you would be "gassy" for weeks on end - with a dangerous combination of both pure oxygen and methane - sounds like a party to me.