That's when you launch a "trucker bomb" at them.
For those that haven't heard or don't know, a "trucker bomb" is usually an old plastic milk jug that truckers use to relieve themselves while driving long hauls. A vehicle gives them a hard time (finger, cuts them off, etc...) and they get back in front of them and lob their grenade back at them.
Just making conversation, that's all.....
