He stays there a few minutes, recovers and goes on about his business. He's old enough now that this is as much a test of his continuing existence as it is anything else.
On the other hand, a lot of folks include meditation of a particular sort in their yoga routine. They empty their mind and try to eliminate their own "self" for a time. I think the worry about this sort of yoga is that if you are "not at home", someone else might move in and reside in your head. Some would take that seriously (I do) and others would not. But bottomline(for me) is that if yoga is nothing more than low impact aerobics and flexibility, than it doesn't seem like much of a threat. I do that much, and I don't think I have a demon in my head.