Yes,I did.Of coarse it had to happen in a MSF class on the last day in front of everybody in the practice session.Just finished the figure 8 in the box perfect and went on to the slow S curve and lost it doing 2mph.The crash bar(not engine enhancement device)and Leatherlykes saves my beauty from getting a scratch!Instructor ran over and shut it off before I could.Leaked a few drops of precious gas in fear of fire he said.Got it back up fired right up and got a 100 on the practical.I learned that it takes work to turn the beast at walk speeds,that front rubber footprint ain't too coopreative to swing about for sure.Signed up for the next advanced coarse.Learned a bunch,want more,I'm just a glutton for punishment