I have dented the door of an eighteen-wheeler who buzzed me (about 6 inches away) while I was going over a bridge. He laid on his horn while he did it, so I was sure it was intentional. I lost it and was able to catch while he was stuck in traffic at a light. We exchanged pleasantries and I found that words alone couldn't express my feelings for him. That's when I unholstered my u-lock. He looked pretty surprised for a second, then pissed. He was stuck and had to turn right, so he couldn't follow me.