I hate when my Nuts fly off. when I was first learning to fly I would always forget to pull the pressure line off the Muffler when I was refueling and of course filled the muffler up with fuel which in turn filled the engine causing the dreaded hydro lock. I did learn the hard way to hold a paper towel over the glow plug hole while you are turning the engine over to clear the fuel. (I always did it upright) Glo fuel tastes pretty bad and the taste stays around for a while no matter what you do.