Some years ago, I walked over to my office one evening, only to hear some of my students having a great deal of fun in a classroom. I leaned close enough to hear what was going on. It turned out that one of them was doing a mocking imitation of me. I couldn't help but open the door to tell them I thought he was doing a good job of it. Anyway, here's an undergraduate's unkind rendition of Simon Schama:

Hat tip.