Read your poll on "which would be the best scene for a garage haunt?". I am a medical lab tech and have walked through the morgue/sat in on the autopsy many times in my hospital. They are really more sad than scary. After a bit, it just looks like you are butchering up a large chunk of meat for dinner.
It's the smell that gets to you, but I don't think you'd want to duplicate that in a haunt. Trust me.