My Trigonometry professor in college, Mr. Deceaux (Southern Polytechnic State University) could also draw circles like this, without looking at the board. It really freaked me out the first time he did it. He was also highly eccentric and had the Einstein Hair(TM).

Dude, get a camera with digital image stabilization next time!

Thanks for the suggestion, joemawlma. I have changed the title of my post to include Jake's name. I should've done it sooner. --Crayfish

What a great band! (And in case you don't already know, this is the original version of this song.)

This is amusing, and well done. I wonder if someone from Apple, Inc. made this?