This is almost exactly the same as what happened to me recently, but I yelled some profanities at the driver when he told me to get on the sidewalk. He decided he wanted to be menacing and follow me down the road in his beat up truck with no working tail lights until I got off my bike and held out my arms in the universal "wanna go?" signal. At this point he drove off. Unfortunately, my Superflash fell out of its housing during this and it began to rain before I noticed it was missing. RIP little blinky light.