There is a printing press at work that, when opened, has the smell of the robot spray in the corrosive chamber in Test Track. Will that even be in the new Test Track? I love that weird smell.
I also ended up in a club for our company Christmas party last year that had the distinctive smell of attractions like Haunted Mansion, Spaceship Earth and Tower of Terror. It was only in specific areas like the corridor to the bathrooms. As I became increasingly wasted, I kept returning and standing in that hallway to experience the smell. I never did get around to talking with someone about just what the heck was generating that scent.
It's so rare to experience those smells outside WDW, but when you do, the world stops.