Tldr funny cart moment from a guy who didn't realize I could see him until too late

I was once chilling in the car for a second after putting groceries away when the guy adjecent to me finished unloading, pushed the cart about 2ft away, made eye contact with me, then proceeded to act like he was stretching and not stepping back toward his car. It was a comical amount of time between the stepping away, eye contact pause, awkward stretch and grab the cart again