I had this idea recently. I do PC support and I notice a lot of people get stressed waiting for their computer. I don't honestly think there's a computer on the planet that could go fast enough for some of them, so I came up with this idea - replace the side panel of a PC with a large hand cranked fan. This fan when operated blows air into the case, quite forcefully if it was big enough. The extra cooling would actually have a positive effect on your machine's performance and it would give you something to do with that energy you build up waiting for the job to finish. Then there's the psychological benefit of feeling like you're actually doing something about the problem rather than being stuck waiting for the computer to decide when it's done - a sense of involvement. The idea might need a bit of work but I think the basic principle is sound. Maybe pedals rather than a hand crank...