This auction [1] (found by Spring [2] reminds me of The Rocket Car Legend [3], a long article about a “real life rocket car:”
I've been trying to figure out a way to put it into words, but the sight is almost impossible to describe. Think of this: You know what it looks like when you shoot a paper clip with a rubber band? One second the clip is between your fingers, and the next it's just … gone. You can't track it with your eyes, because it moves too fast. All you can do is hope to shift your eyes to where it was going, so you can see where it hits.
Think of the same thing happening with a 1500-pound car.
“The Rocket Car Legend [4]”
I don't know of the story presented above is actually true or not (to me it rings true, but you never know). But this truck [5] … sure, it's a truck cab stuck in front of a jet engine, but Does that mean it could actually work? Where's the air intake? Where's the fuel tanks? Jet engines aren't exactly known for their gas mileage. And as the article above points out, you are going to have a heck of a time controlling the vehicle and forget about brakes—they'll burn out long before you hit that mountain side.
Interesting auction though.
[1] http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=8
[2] http://www.livejournal.com/users/springdew/211637.html
[3] http://www.rocketcarstory.com/
[4] http://www.rocketcarstory.com/