Discription of Events: Right after merged on 417 from orlando to tampa noticed a vehicle on my left side ,I we'd speed up and safely stayed in right lane .Did notice vehicle behind me start flashing lights, In that moment I passed in left lane as vehicle start speeding up and thinking !?! As soon I passed in left lane again this vehicle start following me and again start flashing lights 5-6 times. In the moment I I tought that is a police car trying to go fast so again I went in right lane and start breaking... to maybe 55-50 mph and noticed that vehicle is breaking to in his left lane and start flashing again... when he finaly pass by me I grab my phone and thinkimg to call 911...as noticed that yellow truck dodge 1500 pulling a boat and trying to drive really fast and of course couldn't see full plates only XWY46 florida plate and looked like plate kinda hiden under hitch. At that noment I tought my break light or something is wrong with my car or even my tire... looked in rear miror and as it was dark I could see my breaking light is working and it looked my tires are fine . I continue to drive and in about 1 mile yellow truck apeared in right line as I went to left, right about when passed he opened window laughing and using his hands coursing or something -haven't seen exatcly what he was doing but noticed 30-ish year old gentleman with long beard. After passing him He again went in my left lane and start flashing lights. It that moment I did speed up and left him behind... after that haven't see him again but it was just harresment/or road rage wherever you call it at without any provoked situation !!! Please advise.