I wouldn't say this is the stupidest thing I've done but it certainly was strange.
Flying my Apache II trainer (taildragger) dead stick, landed just the other side of the runway in the rough, perfect flare, touchdown, on the ground slowing down the plane flipped up onto its nose, What The?. Anyway walk over to retrive the model and nothing to explain it, closer examination reveals the left landing gear had a wheel missing, after searching it could not be found. Hmmmm