There was an incident maybe 30 years ago where a medical school employee went into New York (I think it was) to pick up a batch of human heads to be used for teaching purposes. He left the box in his car while taking care of another errand, and it was stolen.

The box was found sitting on the sidewalk a few blocks away, with the heads still in it.

One can only imagine what went through the thief's mind when he opened his "prize".