These days, Dax Shepard is living the life. He's married to Kristen Bell, he's got an adorable one-year-old daughter, and he stars on a hit series.
But back in 2003, Shepard was just getting his start as an actor on the Ashton Kutcher-hosted MTV prank show Punk'd.
At that time, Shepard was also an addict with violent tendencies - which may help explain why he almost kicked the crap out of Justin Timberlake while filming the first episode of Punk'd.
If you remember the show at all, then you probably remember the Timberlake prank - quite possibly the most epic punking that Kutch and company ever pulled off.
Shepard posed as a federal agent who had been tasked with seizing Timberlake's home - and pretty much everything else that he owns - to settle a tax debt.