I was told years ago about an incident which had a 'D' notice slapped on it. I won't mention the gliding school identity, indeed I can't guarantee it's exactly true.
Nil wind, so a westerly launch direction was chosen, which meant the winch was situated close to a busy road frequented by double decker uses.
Slight tailwind starts up; pilot holds onto cable until overhead the winch; cable drops on winch and behind it and is fouled by a bus on the outside road, damaging it but no injuries to passengers.