Discription of Events: Male driver in Corolla was speeding up behind me, and he nearly tailgated me about three times. I tapped on my brakes to make him slow down a bit, but he persisted. The person in front of me was driving slow, but I could not pass him. The man in the Corolla behind me whipped into the other lane, he was dancing in his car and had his hands off the wheel frequently. Very erratic.