A Lost Cause

(I hav a friend that works at a home improvement store; one day, a woman comes in looking for a generator)

Customer: “What does it mean when it says seven gallon tank?”

Employee: “Uh, it means it can hold seven gallons of gas.”

Customer: “Gas? Why would it need gas?”

Employee: “It’s a generator. How else would it produce electricity?”

Customer: “I thought u just plugged it in.”