A coupla years ago I was just doing the power checks prior to a much anticipated days' flying from our own strip, when a glider suddenly landed ahead of me:
Than another, then another, then a fourth, with a fifth in the crops nearby.
They'd all been competing in a competition at a well known E Anglian glider field 20 miles away when they all suddenly 'ran out of lift'
Completely b*ggered my day, that did.
Never found out why they didn't chose a closed but flyable RAF base 5 miles away with a massive concrete runway......