I recently heard about someone who turned up at a farmer's field with a trailer to retrieve a glider and on opening it up found it already filled with a nice three piece suite.
I've told this story before....one of the closest near accidents I was involved with was when a glider flew right over my aircraft from behind and touched down just in front of me as my student and I were taking off from an RAF airfield.
Had my student been solo I don't think he would have been able to avoid the glider in the circumstances and at his level of experience.