It has just a power adjuster (next to the key, under the seat and to the rear of the batteries, just one adjuster though, and I had it on full power). Son hasn't ridden it yet; he's going to get it at christmas.
Certainly doesn't seem to be capable of anything like this (click forward to 0:52, when an adult can be seen riding it pretty fast);
https://www.youtube.com/watch?v=tlqwc0EVGN4