Monster Energy AMA Supercross held races at Cowboys Stadium in Arlington on Feb. 18, 2012.

Les Smith (46) of York, South Carolina, left, and Lance Vincent (55) of Youngsville, Louisiana catch some air during a Monster Energy AMA Supercross heat race at Cowboys Stadium in Arlington, Saturday, Feb. 18, 2012. (BRANDON WADE/Special Contributor)Supercross racers are released from the starting gates during a Monster Energy AMA Supercross heat race at Cowboys Stadium in Arlington, Saturday, Feb. 18, 2012. (BRANDON WADE/Special Contributor)Supercross racers bunch up as they make the first turn during a Monster Energy AMA Supercross heat race at Cowboys Stadium in Arlington, Saturday, Feb. 18, 2012. (BRANDON WADE/Special Contributor)

Cody Mackie (333) of Clovis, California races away with a banner stuck on his dirt bike after sliding into a track barrier during a Monster Energy AMA Supercross heat race at Cowboys Stadium in Arlington, Saturday, Feb. 18, 2012. (BRANDON WADE/Special Contributor)

Thick smoke and haze hangs in the air from fireworks and flame torches used during opening ceremonies for the Monster Energy AMA Supercross heat races at Cowboys Stadium in Arlington, Saturday, Feb. 18, 2012. (BRANDON WADE/Special Contributor)

Lance Vincent (55) of Youngsville, Louisiana and Alex Martin (30) of Millville, Minnesota catch some air during a Monster Energy AMA Supercross heat race at Cowboys Stadium in Arlington, Saturday, Feb. 18, 2012. (BRANDON WADE/Special Contributor)

Ben Lamay (52) of Wasilla, Alaska completes a lap as a pit crew member holds out a sign letting him know his lap-time and position during a Monster Energy AMA Supercross heat race at Cowboys Stadium in Arlington, Saturday, Feb. 18, 2012. (BRANDON WADE/Special Contributor)

A Supercross track official watches as racers fly by during a Monster Energy AMA Supercross heat race at Cowboys Stadium in Arlington, Saturday, Feb. 18, 2012. (BRANDON WADE/Special Contributor)