You use tires? I save around 500 grams by putting a couple of wraps of duct tape around the the bare rims. I'm rolling on the equivalent of 2000 psi tires. You know the rolling resistance has got to be low with that setup.
lemme guess: the dude had a flat, and thought: "fark it, changing the tube will take too long -- I'll be better off ripping my tyre off, and I still might farkin win"