In the distant past, there was this NSF-funded geometry center in Minneapolis. There was a computational group theory conference (these guys are over the top) and they invited a few mascots from neighboring fields. I had written a system for algebraic geometry, and got an invite. I'd get up really early in the -20F cold to insure a Silicon Graphics workstation for the day, and set about coding a game to better understand group generators and relations.

It involved dragging.

I loved the 2am conversations that resulted. My idea was that dragging need not respect real-world physics. Dragging should feel like a great tab of acid. And everyone was into this, everyone had ideas.