Found

so, what is this strange disk. was it a spacer for computer tables

Dangers on the Road

with a grain of experience. 40 years walking 2 to 6 miles; sometimes for pictures, always for thinking, observing, wondering. You are going to be hit by:

• a woman in an expensive SUV; she will be coming out of a sidestreet, or alley
• fat 40yr old white man in fat tired pickup
• 20 something cool male in an old honda or such