Thanx all!

+7000others With a low center of gravity I don't think there is a huge risk of tipping with a threwheeler having fun like this. There is always a risk for "tacoing" the wheels when skidding around and I guess the risk is bigger with one rear wheel. In this case the ice was flat and smooth like a mirror, even though threre were some soft snow upon it in the latter part of the film, so all went well! (And fun)