Pumped For Revenge

(A customer comes to the cash desk:)

Customer: “Pump six.”

Me: “That will be £20.01 please.”

Customer: “Twenty pounds … and a penny! Hah! You win this time pump, but I shall have my revenge.”

(He pays and then walks towards the door, cackling maniacally and waving his fist in the air. As he leaves he shouts:)

Customer: “REVENGE SHALL BE MINE, PUMP SIX. WHEN YOU LEAST EXPECT IT!”