Digging A Conversational Hole A Rabbit Could Fit Into

(I am checking out a young couple’s weekly groceries. I overhear their exchange.)

Girl #1: *puts massive pack of batteries onto the conveyor belt*

Girl #2: “Wait, that’s really expensive! What do we even need batteries for?”

Girl #1: *glances nervously at me* “They’re for the TV remote.”

Girl #2: “Oh, I didn’t realise the batteries in the remote had run out. Do we need that many though? I mean what else do we have that even uses batter— Oh…”