There is only one place to interview the cast and crew of The Hangover ... Las Vegas.

Need more from The Hangover? I also interviewed Bradley Cooper, Zach Galifianakis and Ed Helms. Click here to watch that on KPTV Fox 12.

I sat down with Justin Bartha, and well, let's just say he was in a playful mood. While it was fun interviewing the man best known for playing Nic Cage's sidekick in National Treasure I would say it's fair to say you should trust nothing that comes from this interview.

Any improv moment for you during the movie?

The whole thing. I actually wasn't hired to be in the movie. I've known Todd (Phillips) for years and I just showed up. And I brought a DV camera and I just had my buddy film me on the roof of Caesar's and they popped it in at the end.

I was sad for you the entire time ...

You should go on anti-depressants

... because the three other actors get to hang out like crazy and I thought you weren't there for those moments. I was happy to see the slideshow, how long did that take to put together?

The slideshow was kind of a compilation of the entire shoot so we would go to a strip club one night, take some pictures, then go to a strip club the next night, take some pictures, then go to a strip club the next night, take some pictures.

You filmed in Vegas for five weeks?

It felt like five years but yeah.

How did you spend your time?

A lot of drinking. It's called The Hangover and I spend a lot of the movie by myself on the roof, so I would drink and lay by the pool. In the movie I get a bad sunburn, so I did it for real.

Quick Questions with Justin Bartha

Breakfast this morning? Nothing

Favorite childhood toy? My penis

Your hangover cure? More liquor

Who would you be for 24 hours? You

Private concert, who's playing? Bob Dylan

What celebrity do most people confuse you with? Brad Pitt

Need more from The Hangover? I also interviewed Bradley Cooper, Zach Galifianakis and Ed Helms. Click here to watch that on KPTV Fox 12.