The overly-enthusiastic race car driver from the Atari 2600 game's commercial shouting "You look like a real jerk!" and "Oh no you ain't...you're gonna play POLE POSITION!"
Germans Love David Hasselhoff: The show ended up having a pretty big following in the UK, thanks to reruns throughout the 90s on British television. In fact, it received a full-series DVD release years before the US did.
It's likely been playing in your head ever since you opened the main page up.