Put my car in a car show yesterday... Was not as fun as I thought it would be

People today are very rude. I was walking out of Sam's Club here and there was an arab guy with his two sons behind me. He was talking to his son's in Arabic. I turned around, then his two sons looked at me and covered their mouths (like "oh ****, you're busted dad"). The father then aplologozed to me. (they thought that I understood Arabic and knew what they said. I didn't, but pretended that I did. I knew their dad was making fun of my weight). So I acted like I knew what they said and walked away without saying anything, just gave them dirty look.... His son's reaction was so classic, covering his mouth like, "Dad, he just busted your ***!"