Yeah, that's a good explanation.
One time I was wearing a VR headset and the
VIO (which is what moves the screen as you move your head - giving an impression of a real world that changes as you look towards it) crashed.
Now the simplistic explanation is that VIO relies on the concept that you are looking at some part of a "fake" world and the IMUs is what allow the screen to adjust to this world to move as you move your head. Basically, VIO is the software component which makes VR, VR.
Well, the VIO crashed once. Which means: it flew into outer space and the screen along with it.
I was sitting in my chair and I honestly thought I was falling hard, very hard, head first to a hard stone tile floor. It was like someone grabbed my head and was trying to smash it to the ground. One of the scariest moments of my life.
In reality, I never left the chair.