Ok a while back the gas station was having trouble with the credit card readers at all the pumps (we have 8). I put up a large sign over every card reader slot that said "Sorry credit card system is down cash only." Ok I thought it was straight forward sign. Well during my shift I had a guy drive up to pump 8 and lift the sign and slide his card. The guy waited about 2 min before getting back into his car. I thought he was going to drive off and leave. NOOOO this guy drives around to pump 7 and tries it again. Now I am thinking this guy might be a little slow until he drives to all 8 pumps trying his card at each and every one of them. At each pump he had to lift the sign to slide his card. When he reached pump 1 I went outside and yelled at the guy. "Excuse me sir but what was the last grade in school you completed for in most schools you must read and understand English to pass." The guy looked at me then at the sign and lowered his head and drive out of the parking lot very quickly tires spinning.