Should I be concerned about this?

There is a security guard for the shopping center where my son has karate class 4x a week. He drives around the parking lot in a golf cart and every time I see him he has his hand up in front of his face. At first I ignored it, thinking maybe it was just to block headlights or something, but I’ve noticed him doing it when there aren’t any cars around. My son has been taking karate for at least 3–4 months and I’m not exaggerating when I say that I have never seen this guard without his hand up blocking his face, and i see him almost every night. Am I being paranoid? Or does his behavior seem strange?