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xkcd #2932: Driving PSA
(imgs.xkcd.com)
Alt text:
This PSA brought to you by several would-be assassins who tried to wave me in front of speeding cars in the last month and who will have to try harder next time.
As a pedestrian I had to turn my back to make a guy stop trying to "help" me get in a fatal accident. He was bound and determined to get me killed... By being a "nice guy"