possible robbery or scam?

Someone may have just tried to rob or scam me while driving home from work.

As I was passing traffic and getting off the exit to Mckinney Street from 45 south a silver civic was slowing down in the left hand lane with hazards on . Naturally I switch lanes and go around. As soon as I go around he turns off hazards and begin to follow me at a close range and take pictures of my license plate. I take a turn to go towards Alan prkwy and he follows me yelling. Out the window " you know what you did… pull over… you know what you did…" I yell back no I don't, I didn't do s**t.

He proceeds to follow me very closely( maybe 5-6 feet from my bumper) from downtown to Dunleavy via Alan parkway as I turn down Dunleavy I take a side street I don't normally take to see if he will still follow me and he finally leaves.

Was I almost robbed/was he trying to scam me. He did have damage to his car that I noticed when I passed him on the exit.

Can anybody shed some light on WTF just happened to me?!?!?!?