This is really too specific so I kind of believe you but that doesn’t really sounds like him. Maybe he was intoxicated or something. Maybe he’s just having fun because he knows people will recognize him. Idk famous actors are usually eccentric people as well. Also maybe he was hinting at the fact that you should have just been straight forward and asked for photos. I know u had good intentions but he probably thought you were passive aggressively asking for a photo so gave you a hard time. The candy bar part might have been a joke by him...I mean he obviously can afford as many candy bars as he wants. It’s a strange story but he could have been trolling the cashier or something. Idunno