>>> the people over at the morris mountain offroad park in alabama know how to put on a great offroadhow. >> go! >> oh, yes! >> this is great. this is a highlight of the year. >> barbie jeep racing, it is brutal. >> this is cool. it's like in the uk we've got the chasing the wheel of cheese thing. this is like the american version. >> pretty much. normally the thunder that you hear goes up the mountain as the offroad trucks try to claw their way to the top. in this case the thunder you hear is the classic rattling down the hill. you can see that's extremely safe. >> these must be flying off the shelf. dad's giving them to their daughters for christmas and asking for them back on january 1st. >> the wheels are flying off them, as well. tnch >> these are old beat up barbie style jeeps, they aren't working anymore. in this case they use gravity to make them go. guys wearing their helmets, trying to stay as safe as possible. they say participation in this event has been going down in recent years, but they put it on a saturday instead of sunday so more people could come out. >> meanwhile,