When I took Army ROTC, one of the instructors said you could always tell where an officer got his commission by his behavior. If he went to West Point, he would make a lot of hand gestures so you would be sure to see his class ring. If he went to Officers Candidate School he would have well spit-shined shoes because that's what OCS stresses. If he got his commission through ROTC, you could tell because he would be trying to pull open a door that had a sign on it that said PUSH.