ive forgotten wingtubes ,transmitters, wings, fuel, sunglasses, and the list could go on....but one of the dumbest things ive done was take off with ailerons reversed twice...one time i crashed on takeoff...the other time i was able to correct the problem on my transmitter i had to fly it around really high and concentrate on the reversed ailerons, then when it was high enough i went into the menu on my 10x to reverse them