It is, but is being overridden overtly rather than covertly - as each wheel as a directable thruster in it (visible in some of the multiplayer videos we've uploaded), which can stick you to the surface.
Here's a video of what came next. The tumbling down the slope (oops) gives an indication of how this works. You can correct a fall using a thruster, but this didn't quite go right, except at the end...
https://youtu.be/t9F0HC18sSI
Oh dear, that's some badly broken audio, and a terrible framerate. Youtube, please stop being so incredibly unreliable and unstable.