There is a prop of an injured person laying on a table at the far end of the Rotunda. It is kind of freaky and other museum guests have told me it scared them, as they leave the Supercomputing section and have this unsettling humanoid surprise them from behind the corner.
It was a real prop used on the set of Star Trek for some episode, so that is admittedly pretty cool and I guess it belongs in a museum somewhere (though maybe not this one).
The Scary Guy is eventually going to not be here anymore, when the rest of the Star Trek exhibit leaves.