For some reason, the pump wouldn't take my Visa card. It beckoned me to, \"please see cashier.\" Fortunately, I had hours to spare and was delighted to spend my afternoon with the Shellmart cashier, which is precisely why I pulled into a station with automatic electronic pumps. Alas,  the pump subsequently decided to accept a MasterCard, which prevented me from journeying inside to sample Shell's stale generic-brand Twinkies.