What’s with the UFC’s heavyweight fighters?  Earlier today we showed you a clip of Frank Mir attempting to conquer his fear of heights by jumping off a diving platform into a pool, and now a video has emerged of the 300lb Roy Nelson tearing around on a BMX in superstar TJ Lavin’s famous backyard set-up.

Showing that fear is not a factor for him, ‘Big Country’ get’s on a BMX and attempts one of the jumps on the course.

Can the pedals on a BMX withstand the weight of a 300lb self-proclaimed fat dude?  If he crashes will his belly act as a giant airbag to break his fall?  Find out the answers to these questions and more by watching the clip below, courtesy of MMA-30.