Real Pens Never Go Out Of Stylus

(An elderly woman is paying for her purchase with a credit card. I help her swipe her card through the reader and prompt her to sign on the screen with the stylus. She is having some difficulty.)

Customer: *shaking the stylus* “This pen must be out of ink; it won’t write.”

Me: “It doesn’t use ink, ma’am. You need to keep your signature within the box.” *pointing at the box on the screen*

(She managed to make some illegible squiggles in the box. I handed her her receipt and wished her a pleasant afternoon. I giggled inside because I’m pretty sure she thought her shaking the stylus for ink is what made her signature appear.)