You could tell that the schmoe guy got uncomfortable once his aggressive acting didn't pan out. He's probably used to puff up his chest and get his way by using his "scare tactics" like flaring his lats and getting all up in peoples faces.
People like him need to grow up, a guy in his mid 30s or w/e walking around with ils in tanktop and baseball caps, throwing hissy fits when someone does not agree with him.