ok, after about 0.5 minutes of fiddling around, I've managed to produce this.

It's a video of a quater suspended from a string and given a little bit of spin. It shows the same effect that you see in the STS-101 video, except that my quarter is not as reflective as a shiny new washer, and my 60w lamp is not as bright as the sun. Also, the quarter would twist until the tension in the string built up, and then it would stop and begin twisting the other way, so the pulses of light are not as regular as the would be with an object tumbling in zero G.

or if you prefer, this is a video of a tiny alien spacecraft that I managed to capture in my sun room. The aliens were quite curteous. they had collision lights on thier ship. I welcomed them to earth by swating them like flies.