Torturous resignation. Make a beautiful move that leaves them wondering how they should recover. Then, yell at them while they're thinking. They will probably be startled. They may tip over their king. You win.
In all seriousness, though, I love seeing people forced to resign against their will after one beautiful move. "You thought you were ahead? You were up a bishop, but now you will die."
I have never seen a better example of not knowing when to quit. I prefer the "Never Resign" battlecry, but even I would have thrown in the towel around move 25 or so. 66 moves of just useless wandering serves no purpose at all. Way to teach him a lesson!
I think 7 knights on the board has got to be a record!! You should definitely join The Dark Knights. After that impressive display, I don't think anyone is more worthy of membership than you.
http://www.chess.com/groups/view/the-dark-knights