This was posted on a FB group and people are saying they'd draw their weapon if they were in the car. I dont really think that's the best course of action. I feel this would be best:

Call the police so they can document and hear everything
Get out of the car and get off the road (since its stop and go traffic)
Wait for police to arrive.

Assuming the trucker stays in the truck, of course. IF he gets out, thats a different story but assuming he stays in, is the threat considered over as soon as you get out of the car and away from it? Some feel they'd be justified to shoot at the driver of the truck based on this.

http://abc7.com/news/road-rage-incid...-video/984666/