I noticed the location. I thought maybe they were trying to keep the C.G. close to the center.

In the writeup, they claim to be the only wheelie car that could spin around while doing a wheelie!

The only thing better, that I've seen, is the old wheelie truck that could tip over backwards from a wheelie! It had kind of a curved roll bar arrangement over the top of the truck, but many tracks would not let him go over backwards, because it would slide on the bars, before it "rocked" back forward onto the wheels, and damage the track surface. I always liked my for cars to stay "greasy side down"! :-)~