With no release of air pressure I imagine the sealed container popping off like a rocket . I was told years ago for a parakeet to do that in a paper bag.Out state Vet with euthanize them and do a necropsy for 20 dollars. Of course I have to drive it down there. They use co2. Do you think there is ant way I could use a vacuum cleaner hose and attach it to my tailpipe of my car and put the other end in a close box and just run my car?