I pulled a tarp from the top of some shelves and ended up catching a head, and in the last place I worked I came into work one morning to find a hand in my desk drawer. This was a slightly nicer surprise than the scalpal, with which I had attempted to amputate my finger two days into my employment...

I should probably point out that the head and hand were both from models and had been used in museum displays. Which makes a less interesting, but ultimately less terrifying story.