T.J. LAVIN IS IN A COMA AFTER A BIKE ACCIDENT!

BMX star and MTV host T. J. Lavin is in a medically-induced coma after a bike accident Thursday night, according to TMZ.com.
The 33-year-old athlete was competing in the Dew Tour Championships in Las Vegas, Nev., when he crashed his bike while on a ramp.

A video of the accident shows Lavin losing control of the bike, tumbling a few feet and then seemingly not moving as spectators rushed to his aid.

The biker, who has won several X Games medals, "was attempting a nac nac combination over the second set of the dirt course, and failed to get his feet back on the pedals upon landing," ESPN reported.

Lavin, who is also a musician and has hosted MTV's "Real World/Road Rules Challenge" since 2005, was reportedly knocked unconscious and shattered his right wrist.

Business partner Chas Aday told MTV that Lavin had sustained bleeding to the brain.

Aday also told the network that the race was to be Lavin's last professional race before retirement.

Lavin was reportedly taken to University Medical Center, a Las Vegas hospital, where he is in critical condition.

The latest edition of "The Challenge" is only two episodes into its current season (airing Wednesday nights on MTV), but the series is filmed in advance. MTV has not yet responded to a request for comment