@edgarblythe,
I don't consider the plastic test to be the same either.....that was done by a well known "smart guy", and I won't mention his name, sometimes he does things like that.
There is a way to fold a regular piece of paper 8 times, they did it on that episode of MB, but I don't remember exactly what he did.
As far as folding in half, again and again....7 is the limit.
I've always wondered if you could do better with an old large bible, the paper in some of those are very thin, like rice paper, if I ever run across one that's trashed I'll rip out a page or two and try it.