I got this idea from a friend of mine (he eventually married the girl he was dating at the time), I started talking in a monotone for 30 minutes about the history of the theorem, the different conjectures used to prove the theorem as well as using my fingers to draw the 3D graphs used to prove the theorem (in the hotel lobby). I still crack up when I think about the scene- some guy in a hat, jacket and tie using both his hands to plot x, y and z points on an imaginary 3D grid, while the girl sitting across from him is nodding reassuringly that she understands everything he is saying.
I couldn’t argue with that.