Last year I was riding around for the firs time in some new Levi's I got for cheap that ended up being too tight for me, like a size 30 or whatever. I'm pretty skinny so I shrugged it off and rode to a certain spot, all the while riding around downtown running errands and the like. All in all, it took about four hours of non-stop riding to do everything, and by the time I made it to the last spot it was impossible for my jeans to stay up. I had to run across the street to the neighboring mall to by a belt.
Ever since I've wondered how many calories burned or how many pounds I lost that day.