Doing ANYTHING to someone that is aggressive or antagonistic while you're on a bike is fucking stupid. STOOOOOOPID. First off, you're on a bike. Not only are you exposed while asshole is in a 5,000lb death machine, you're on a fucking bike. That means your greatest advantage is agility and speed. The smart thing is to get the fuck out of dodge. Angry guy is angry? Good, fuck him, get away and live a happy life. No fingers, no kicking, no ball bearings, LEAVE. Retaliating escalates the situation. That's bad for you. It's bad for your legal case should something reallly happen, and it could be what gets you killed, shot, or someone else hurt. I ride conservatively, so these issues are very rare for me, but I guess I don't go "hot" the instant someone is a fucktard, there's no upside. I carry pretty much 24/7, but the moment someone does something stupid when I'm on the bike I just get away from them. I'm not going to get into a scrap because someone has a Vin Diesel complex, the gun is for the dire extreme, not for teaching people lessons.