Big Forehead License

Yo, forehead is so big...the photo on yo driver's license says "to be continued on the back."

Explanation

Experiment

Explain Bear

Alright, listen up, you knucklehead. So, like, this joke is about someone with a huge forehead. Okay? And the joke says that their forehead is so big that their driver's license photo doesn't fit on the front. You got it, genius? It spills over onto the back like a cliffhanger.