I remember when I worked at Tomorrowland in MK, the Cast Members stuck working at Tomorrowland Speedway hated their jobs with a passion due to the gas fumes. It would often make them dizzy/light headed/high. The Speedway was the one ride no one wanted to work.
On a side note: During my recent visit to my cave in Camp Jurassic (the cave with all the water), I realized that it smelled like the E.T. queue. So if you miss the smell… there ya go!