On other occasions, people have heard the disembodied rattling of bones within the Redpath Museum. One night guard, who has since retired, reported hearing bones creaking and rattling on several occasions during his graveyard shifts. He also noted, while patrolling the third floor overlooking the lower levels, something that deeply unnerved him. Sitting atop a display case is the skeleton of an anaconda snake. Horrified, the guard recalled sometimes hearing bones clacking in the middle of the night.