Disneyland's Space Mountain ride remained closed Thursday while state officials investigate how a guest at the theme park got off the roller coaster while it was in motion.
The incident happened Tuesday afternoon, said Luke Brown, a spokesman for Cal/OSHA, the state agency that is investigating the circumstances.
"Disney is fully cooperating with Cal/OSHA and we're working with Disney to determine what changes are needed going forward," Brown said.
Disney officials say they hope to "get the attraction up and running shortly."
An unidentified man in his 20s "forced" his way off the ride despite a lap-bar restraint. He escaped injury but was taken to an area hospital as a precaution, officials said.