ELI5: Explain Like I'm 5

Motion simulator

Imagine sitting in a special chair that moves and shakes just like a real car or roller coaster. When you watch a movie or play a game, the chair moves in sync with what's happening on the screen. If you're driving a car in the movie, the chair turns and bounces as if you were really driving. If you're riding a roller coaster, the chair jerks and drops just like the one on the screen. This is called a motion simulator! It's like a special ride that you can control with a video game or movie. It's a lot of fun!