Discription of Events: Came left out of a Tampa prep school in a speedy manner. There is a merge lane he could have went into but he proceeded to come into my lane nearly hitting me. I was clearly in his line of sight and there were no other cars behind me. I could not tell what he was doing and then had to slow down and did stop not knowing if he was going to side swipe me. I laid on my horn and he then stopped coming into my lane and went back over a bit but we both stopped at same point too and at the end of the merge point and he was next to my car. I started to go but he proceeded to take off fast to go in front of me and quickly slammed his brakes and did so a few times after that trying to have me get close to hitting him. Cars began to come up behind me so I went over to the left a bit so he could hopefully see other cars are behind him at this point. I will not deny that I did give him the finger when he almost hit me and when he first slammed his brakes right after he passed me because it was when I began to go and I guess he didn’t like it. I would not have posted this if he would have just showed he was sorry for almost sideswiping my car. When you commit an offense that endangers someone, they get defensive. People used to wave a hand showing they made a mistake but it is different now. This could have been completely avoided.