Left the door to my room unlocked one day when some family friends came over and they had a three year old who literally got into everything....Including my
Jurassic Park collection, which I had just finished setting up on a nice bookshelf not even two days after moving into the new house. Needless to say, while I was playing basketball with their two older boys, the little tike, who never was watched by his folks, totally disimaited my JP display, knocking many of the bottom shelf figures over and sending top shelf figures toppling to the floor by shaking the bookcase, one figure even ended up with a busted leg and some accessories ended up in the heating vent.
I was super ticked off, I mean, JP toys, especially the classic Kenner ones from 1993-1994 aren't the easiest pieces to come by these days, at least not for cheap.
So, I spent several hours trying to reset everything back up and learned to lock my door when the kid came over. Still burns me up that one of my favorite figures ended up losing a leg in the process though.