You got $10 on your pump

I’m driving and realize I’m super low on gas. I pull up to the nearest gas station and see that my wallet is at my house and no cash in my car. After clawing at my self worth and incompetence, I remembered that my card info is in my laptop. So I bring it over to the clerk and tell him the story. The dude listened and says he can’t enter it manually. He then says, “go ahead, you got $10 at your pump.” At the edge of disbelief and in deep appreciation, we chatted a bit and I learned his story and his work schedule. I figure returning later with $20 is the least I can do.