I was just cruisin' home from work late at night and got passed by a Grand Am. No big deal, I'm not racing tonight. I let him get some distance in front of me and decided to keep up with him. I need to change freeways and my offramp is coming up and I need to pass to one other car on the freeway. When I speed up the Grand Am nails it and the other car speeds up too. I'm thinking, "you're kidding right?" and pass both of them, quickly. Just as I pass the Grand Am we go over a hump in the freeway and out of the corner of my eye the Grand Am starts to swerve away from me to the center divider (concrete), skips off it and spins behind me across 5 lanes of empty freeway and taps his rear end on the concrete wall. I came around to see if the guy was ok, but the CHP was already there and the guy was walking around outside his car. The rear bumper was missing. Scarey stuff.