Sadly for Walter, not one he can play on his iPAQ.
I was over at the Grad lounge a while ago with some of the first- and second- year grad students. They had just finished classes, were enjoying some Hermannators, and getting a bit silly. At one point there was a bit of a lull in the conversation, and Gabe says "Alright..." and does some crazy thing with his hands. I had no idea what was going on, but two or three other people yelled out "Feynman diagram!" and on it went from there.
Yes, they were playing Physics Charades.
Here are the categories: "Feynman Diagram", "Operator", "Commutator", "Phenomenon", and "Tensor" and "Physicist", both of which I was unable to adequately capture on film. Here are the rest:

"Tensor" involves a multi-step process - first you hold up ten fingers, and then make a motion like you're swinging a sword. Ten-Sword... get it? Tensor? Yeah, I didn't really either. "Physicist" I refrained from photographing as most of us would still like to graduate.*
This is the stuff your brain comes up with when you've been studying too hard.
Later that night, we went to a end-of-term/Christmas get-together at Warren and Carla-Rae's. Carla-Rae is not a scientist, and we were forbidden from playing drunken Physics Charades. Probably a good thing for our social development!
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*I kid, it was merely a grumpy face. Ha?