Discription of Events: Was waiting in line for Starbucks drive thru, had to leave a gap for the incoming traffic coming into the parking lot. As I was moving forward, the black truck swung out in front of me cutting me off, making me slam on the break. They almost hit the front of my car and if I hadnt stopped in time there wouldve been an accident. As I was leaving I saw them speed out almost hitting another car while throwing out a middle finger.