At Six Flags theme parks in the U.S., the price of regular admission — roughly $50 — gives you access to a roller coaster redone with virtual reality overlaid on top.
At Magic Mountain near Los Angeles, that means strapping on a Samsung Gear VR headset to battle virtual alien invaders while in real life you're hurtling around a 40-year-old track of twisted steel. You don't steer or aim really, but you can look around the world as your ship blasts aliens in foreign spaceships.
It's a mind-blowing experience that combines a fictional futuristic setting with actual sensations you can get only from having your body tossed around. Check it out: https://youtu.be/d-uKEC1JWDk .
Pro tip: Go around twice, once with the headset on and once without, and decide for yourself which scares you more.