[QUOTE=Angela060;1087757] Good thing it was not stuck upside down.[/QUOTE]
That’s actually almost impossible.
Either there’s enough energy to go all the way round or there isn’t enough and you roll back.
Now, there might be problems with the wheels that’s keeping the coaster from rolling smoothly, but again, the physics would have you stopped before you went upside down 99% of the time.
By the way, at any other park, riders on a launched coaster like California Screamin’ would never even be allowed to take large loose objects or bags with them, and certainly not when there’s an inversion involved.