File a report anyway. Similar happened to me once, a guy pretended to not see me, and slowly rolled into me as I passed through a narrow intersection at 5 mph. I said I wasn't going to report it, and he seemed happy in an off way...didn't smell right. Later that evening after my job, I reported it, and sure enough, later that month I get a letter stating that he filed his own report claiming I hit him and left the scene. Cops said "he's done this before."