...at least "gaff" in the sense that it caused damage to a plane, fortunately mine.
This past weekend at the Los Banos Aero Tow, I proudly rigged my brand-spanking-new 6-meter Nimbus 4, did a range check and carried it out to the end of the line.
I had been warned by at least one person (yes, that's you Jerry!) that the grass on the field was a little tall and that there were tufts that could catch a wing tip.
My trusty tow pilot, Ken K, commented on how low my plane was sitting low to the ground. I foolishly didn't think much of either warning. About 50 feet into the roll-out, I dropped a tip, the glider ground looped and crashed. Smartly, Ken released me when things got ugly so there was no damage to the tow plane.
My recommendation to new pilots is this: while a glider sitting low to the ground may look cool in photographs, it's a recipe for disaster on anything less than pristine runways.
While rebuilding the cockpit on the Nimbus, I have decided to get rid of the shock absorbers (it's a pretty light glider) and get the gear down as far as possible to hopefully avoid this kind of problem in the future.
Anyway, that's my "My First..." story and hopefully my last....