I don't know. He's rides with his feet out quite a bit. Certainly didn't do much self stabilizing when it started to wobble! His problem may have been too much speed approaching the stop sign and then over brakeing. Didn't appear to have good control on approaching stops or turns.its neat, its supposed to be like things from science fiction come to life.
one can make their own, this guy did.
i looks like the only way to steer this sucker is though counter-steering. I bet its fairly stable since the whole thing is a giant gyroscope.