Discription of Events: I was in the far left lane on the I-75 while this person was in the middle lane next to me. he was staring at me giving me an angry look (no idea why). Then he started swiftly shifting left DIRECTLY INTO MY CAR which wouldve resulted in a SERIOUS ACCIDENT if I hadnt immediately slammed on my breaks. he never had any blinker on that signaled he was trying to get into my lane. I went into the far right lane after to get away from this psychopath and I looked over and he was flicking me off