Vice President, Rational Smarter Product Development
IBM Software Group
This MIT Physics Professor, Walter Lewin, has many talents, but his ability to almost magically draw dashed lines without seeming to lift his hand is mesmerizing. Engineers spend a lot of time in classrooms, listening to lectures on a lot of arcane topics. So when you find a professor who does something unusual, it does really stand out. I once had a mathematics professor with an uncanny ability to hand draw perfect circles on the white board whenever he needed one. I will never know how he did it, but it was worth waiting for in any lecture.
You might enjoy more of his lectures on a variety of topics. You can see there here: http://video.mit.edu/channel/walter-lewin/