https://www.siliconvalley.com/2021/02/08/yes-that-was-really-a-five-second-reddit-ad-during-the-super-bowl/

(CNN) — No, it wasn’t a glitch — for some Super Bowl viewers, a Reddit commercial really did pop up on the screen.

The spot, which was just five seconds, opened as if it were a car commercial, but then flashed to a test-pattern screen with Reddit’s logo, which was followed by a printed message.