I have had a car load of guys try to knock me off by opening a door into me-I got the tag # only to be told that our state has no numbers like that. I have also had people spit at me. But the absolute stupidest one is the person that I was waving around me, who stopped and got out of his car to yell at me. He then got rear-ended and got to explain why he was out of his car at an intersection screaming obscenities at a bicyclist. (Who, I might add, was very glad to ride back and talk to the police)