Discription of Events: A balding single white male about 5 foot 11 was in the Drive Thru of a popular chain restaurant on Monday April 13th, in front of our vehicle. All of the cars including ours in that time frame were appropriately spaced. This driver was repeatedly reversing and attempting to do something that looked not possible to attempt, and we were afraid that he was going to back into us and cause an accident. We realized the severity of the situation when he got out of the large pickup and started yelling at us to stay away from him. Then he was laughing about it. He became angry and verbally aggressive which would have been on In-and-Outs cameras. After we left the drive thru we saw a white truck with that license plate driving by us in another corner of that shopping center. We were concerned that he had followed us after the incident in the driveway at the drive thru. The drivers verbal assault on us was reported to the restaurant. We did not do anything wrong. We didnt understand what the driver was trying to achieve while in the line, we only wanted to make our way to where could pick up our food.