Mike Tyson was a hit at this year's Sundance Film Festival in Park City, Utah. Not only for his humble attitude, but also for an upcoming documentary about his troubled life.

The fallen boxing champ was in town for an upcoming documentary, in which the former boxer recounts his life in his own words. The James Toback directed "Tyson" promises to provide an "intimate and moving no-holds-barred portrait of a humbled Mike Tyson."

Those choice of words aren't usually the terms used often to describe the boxer. However, this time around, it fit perfectly, and the film managed to spark a lot of interest.

"I'm just pretty humbled to be here," the former boxer said during a festival Q&A. "I hope you guys liked the documentary. I'm in the boondocks with this. I had no idea it would come to this degree of success or anything; I was anticipating probably this would be hot on the corner of 125th Street, but I had no idea such an amalgamation of people would just rally together here to support me. I can't express my appreciation and gratitude for this moment."

Iron Mike, as he was once known, isn't "iron" any longer. A very humbled Mike showed up to Sundance. And as he explained of the film's viewing, he was a different man as champ. Today, he has to keep his ego in check, or as he puts it, "I will go down."

"You become very vulnerable," Tyson told a crowd of viewers. "That was a scary guy on film. After 25 years, I realized what I projected to the world. I never understood why people looked at me and made those judgmental opinions about me as to why that might be. That's who I wanted to be -- I wanted to be the champion, the arrogant champion, sitting on the throne and just ruling everything. It was just my make-up."

According to reports, Sony Pictures acquired rights to distribute "Tyson." But, prior to seeing it, the company said it hadn't planned to do any more documentaries.

"Nine months ago, we were thinking we weren't going to do any more documentaries," Michael Barker, co-president of Sony Pictures Classics, said. "Then you see a film like this."

The New York Times reports that "Tyson" had already been screened at a number of festivals -- including Cannes -- and Sundance was an attempt to reignite interest in a movie.

The paper says the next step for Sony is to begin releasing "Tyson" in theaters on April 24.