What we have here is a teacher spinning a basketball. On the end of a pen. The same pen he is grading papers with. No big deal. Unless, of course, you consider impressing the Harlem Globetrotters to be a big deal:

Okay. We’ve got to admit, we’re impressed. Got a proposition for you… You agree to teach us that trick and we’ll teach you a few of our own.

[HuffPo]