CMT's new series, Ty Murray's Celebrity Bull Riding Challenge, is currently filming in Texas. The first of six episodes will premiere Aug. 10. The cast includes musician Vanilla Ice (Rob Van Winkle), actor-musician Leif Garrett, actor Stephen Baldwin, former NFL player Rocket (Raghib) Ismail, Moto X rider Kenny Bartram, actor "Nitro" Dan Clark (American Gladiators), Survivor's Jonny (Dalton) Fairplay, UFC fighter Josh Haynes and actor Francesco Quinn (Platoon, 24). The cast will be taught how to mount a bull in the chute and how to take a major fall as they try to survive the most intense eight seconds in sports. The celebrities will also compete at a Professional Bull Riders event in Nashville.