I think we might be raising a Cirque de Soleil baby.
We've been making masks at our house. So I've got various masks I've aquired over the years out for inspiration. Arthur was asleep during this shot and I managed to rest the mask he's wearing on his shoulders. Despite what other people in the room thought I might be doing, Arthur's mouth and nose were unobstructed and he slept through the entire procedure.
For those of you wondering where the other John went, later on I did put some dry ice and hot water into a very large ziplock bag and closed it. About a minute later there was a very satisfying explosion, and I proved to Mark that a small chunk of frozen carbon dioxide can expand enough to blow out a plastic bag.
Remember; it's not a real science experiment unless something goes BOOM!