Theme Park University got the opportunity to ride through Space Mountain at Walt Disney World without the special effects. All the lights are on! You get to see how closely the tracks are wound up. Try to coordinate in your memory where things happen.
This makes clear how much the darkness and light effects add to the ride. One commenter said,
Im laughing at all the trash cans and ladders everywhere as if this is just some warehouse
If you've never been on the Space Mountain roller coaster, there's a comparison video showing what the ride normally looks like at Laughing Squid.