Even though he is the very next person in line, and the person is front of him does not have a complicated transaction, Mr. Next-In-Line-Overly-Impatient Guy stomps his feet and makes loud noises with his throat. He emits a variety of impatient sounds like “Pffft” and “Ckkkkkk” and says “Come on!”
He reacts this way even if he’s been there 5 seconds. He does this everywhere he goes.
A favorite move is to get out his phone and pretend he is talking to someone, “I’m STILL here! They’re just PLAYING AROUND in front of me!”