Amazing Near Crash Video Footage

I've never been in a severe car accident, and I hope I never am.   I'm sure it's has to be terrifying to have no control of your car and how quickly everything must happen.  A few inches difference and this video wouldn't be a near miss.  It would be a deadly accident. 

Make no mistake about it, if I was that driver, I would have crapped my pants.  I don't know why this driver had a camera on their dash, but it's amazing footage.