always have pepper spray. It works like none other. It causes eyes to slam shut, it chokes you, it burns. If you use it make sure you get to a safe location and call the police. If you dont call them then you are just a guy on a bike who sprayed a guy who thought you hit his car. When the police show up to talk to you express his aggression and your fear for your safety. Make sure his aggression was high enough before you spray(advancing towards you).