Something unusual after dinner

We met a guy who was quite mad this evening. It was when we finished our dinner and was going to walk our from Burger King. A guy opened the door with his two arms. Actually, somehow this guy also said hello to Andrew when we're enjoying our meal. I asked Andrew if they knew each other. Andrew said no (?!) I just say thank you to the young guy when he opened the door, but it seems he didn't hear that. Rather, he started banging the door violently. Now we realized what the matter was, and kept walking and tried not to bother what happened behind us It's drug...