In the 80s, an R22 in NT was running roughly, the pilot landed on the only clear area, a rock pinnacle to investigate. He left it running at idle, control friction on, carefully climbed out onto right skid, crouched down to look at engine.
Stepped off the skid to change viewpoint, saw that the vibrations from the rough engine were causing the machine to skip around a little, and on the rough rock, headed towards the downhill side of things. He tried to pull it back, got pulled along himself. Said to himself: "SELF!! WTF are you DOING???" and let go of it.
it skipped to the edge of the rock and threw itself off the cliff. Pilot looks at mess at bottom... ooops...will the Streaker's Defence* work for him?
*Streaker's Defence = "It seemed like a good idea at the time!"