Thanks but the link won't work for me. I thought it was the kart locking up under braking and then realised I wasn't braking. The impression is that you have actually run over something or been run into and lifts the kart off the track surface. I did wonder if it was some sort of reaction to deep water on the track or if it was a bump in the track surface.
I will try it again to make sure but it just seems like some invisible obstacle and it doesn't seem to make any difference what speed you are going.
I will try it again to make sure but it just seems like some invisible obstacle and it doesn't seem to make any difference what speed you are going.