I find this confusing. (via Gizmodo.)

For the first time I’m going to write the following sentence. The top YouTube comment link is helpful. Or would be, if I were good at math. I trust.

Belle and I agree that the sleight of hand comes at 3:11 when he ‘shifts it along a little bit’. (My cat is looking at me, skeptically.)

This earlier video provides a nice introduction as well.