Courtesy of EW, here are a couple pics from the upcoming Pixar short Partysaurus Rex*. The short will be appearing in front of Disney’s upcoming Finding Nemo 3D re-release. Let’s let director Mark Walsh shed some light on the premise:

“If you’re a bath toy you get really intense playtime. It’s like a party. Then when the water goes down you can’t move. You’re helpless. And that’s pathetic, these guys in bottom of the tub all the time.”

Okay, maybe that didn’t shed as much light on the premise as we’d hoped. That sounds like kind of a downer, actually. Luckily, these images portray Rex in a less helpless manner. The top picture looks like Rex holding court in what I can only assume is some sort of high-energy, underwater ecstasy rave:

You can catch Partysaurus Rex in front of Finding Nemo 3D when it premiers September, 14th.

*I’ll be disappointed if that Xbox Live tag isn’t already claimed.