The tale of the car key...

...and the careless daughter.
Daughter throws car key into bin at Reading Festival - she insists she was free of mind altering substances - but can't explain her actions!
Parents spend a number of hours seeking out spare key (unlabelled) and sorting out a number of contingencies in case the key doesn't work while daughter enjoys 'The Queens of the Stoneage' at the festival and a peaceful lie in this morning!
Daughter persists in her illusion that she is 'grown up' and can look after herself....