>> i knew right then something had gone seriously wrong but i had no idea what. >> rock crawlers can conquer just about any obstacle in their way. bob standich has been driving these vehicles for more than six years. >> driving a rock crawler is an adrenaline rush. i know a lot of guys get it from speed but believe it or not, crawling around sitting 50 feet up on the side of a hill, and you can feel the tires inching off of a rock underneath you, it's a pretty good rush. >> july 7, 2005, in portland, indiana, bob competes in a rock crawler tournament. fans pack in to cheer on these vehicles that look like something straight out of "mad max." >> some people watch for the races. some people watch for the wrecks. you got people there to watch rock crawling.