Underpants Run Action!

Underpants sandwich. 2012 Ironman Hawaii Underpants Run.

2012 Ironman Hawaii Underpants Run.

2012 Ironman Hawaii Underpants Run.

Awkward. 2012 Ironman Hawaii Underpants Run.

Loco for coconuts! 2012 Ironman Hawaii Underpants Run.

2012 Ironman Hawaii Underpants Run.

Just married. 2012 Ironman Hawaii Underpants Run.

2012 Ironman Hawaii Underpants Run.

2012 Ironman Hawaii Underpants Run.

So do we! 2012 Ironman Hawaii Underpants Run.

Vive le France! 2012 Ironman Hawaii Underpants Run.

Congrats! 2012 Ironman Hawaii Underpants Run.

Second word …

What's funny now might not be funny on Saturday! 2012 Ironman Hawaii Underpants Run.

2012 Ironman Hawaii Underpants Run.

2012 Ironman Hawaii Underpants Run.

Love the enthusiasm. 2012 Ironman Hawaii Underpants Run.

Good recruiting, W. Ink. 2012 Ironman Hawaii Underpants Run.

Ali‘i Drive. 2012 Ironman Hawaii Underpants Run.

You're going the wrong way! 2012 Ironman Hawaii Underpants Run.

It's "Ten" all over again. Braids next year? 2012 Ironman Hawaii Underpants Run.

Ali‘i Drive—not the video series. 2012 Ironman Hawaii Underpants Run.

No point to this at all. That's why it's fun. 2012 Ironman Hawaii Underpants Run.

One of these is not like the other. 2012 Ironman Hawaii Underpants Run.

Oh, Canada! 2012 Ironman Hawaii Underpants Run.

2012 Ironman Hawaii Underpants Run.

2012 Ironman Hawaii Underpants Run.

Who is shooting whom? 2012 Ironman Hawaii Underpants Run.

It's all very official. 2012 Ironman Hawaii Underpants Run.

Not sure where to go with this caption. 2012 Ironman Hawaii Underpants Run.

They did nothing but work out while in prison.

In case you missed it the first time. 2012 Ironman Hawaii Underpants Run.

Body shot! 2012 Ironman Hawaii Underpants Run.

Paul Huddle and Roch Frey hold court over the proceedings.

2012 Ironman Hawaii Underpants run.

2012 Ironman Hawaii Underpants run.

2012 Ironman Hawaii Underpants run.

2012 Ironman Hawaii Underpants run.

The Underpants Run isn't all fun and games; sometimes it's downright frightening.

2012 Ironman Hawaii Underpants run.

Ken Glah has finished the last 28 Ironman Hawaii races, and this year will be his 29th. He finished 4th in the famous Iron War of 1989.

2012 Ironman Hawaii Underpants run.

Calisthenics are part of the ceremony.

The run itself is about 400 meters.

2012 Ironman Hawaii Underpants run.

The crowd is massive, everyone wants to show off.

Plenty of coordinated outfits, if they can be called outfits.

2012 Ironman Hawaii Underpants run.

It's an annual tradition. Two days before Ironman Hawaii, hundreds of self-assured triathletes strip down and strut around Kona.