Well, I don't know how this thing would work, but the one my dad built 35 years ago was like a carnival ride. He put a big wide custom seat on it with a seat belt, so he could strap my brother and I on each side of him, and he could do donuts on a dime, around and around and around! It was a lot of fun, and would get spinning pretty fast, fast enough that we needed the seat belt!! It would still do 50+ mph if you wanted it to. Remember, '69 Colts didn't have 600HP or anything close to it, but sure was fun!
I'm going to have to get a picture of it from him and throw it up here......