I can confirm.  I had the same thing happen to me.  I filmed it for comedic effect.  It was like a bad acid trip.  I even fired the hull guns just to see what would happen.  
Sky/ground/sky/ground/sky/ground, etc. while the treads were screaming at high speed.
With me, I was climbing the hill forward and I think I slid backwards down the hill.  And I didn't get very far up the hill to begin with.  I never found the flat terrain - just kept spinning over and over and over.