>>mauney: from the time you nod your head that you get off its all reaction. if you're thinking about it it's too late... >>elliot: some guys just look smooth and make it look easy and then some guys look like its just a dogfight every time they ride one. >>jong: so the bulls range in size from about 1100 to just over 2000 pounds. when the rider's ready, he willnod his head, the chute will open. then he's got eight seconds to impress the judges. as you can see he's off there... and preferably... not get killed. he didn't last eight seconds. >>reporter: the pbr tour is a true american success story...a story that started in 1992 when a bunch of bullriders decided to break away from the broader rodeo circuit that the sport had always belonged to... >>lambert: the first day there were 11 of us and we put 1000 dollars apiece in to form this company and then weoffered it to the top 30 bull riders in the world at that time in professional rodeo. that's where we all came from. >>reporter: 22 took up the offer and they never looked back...today the tour runs over 300