I was in line, waiting in row 1 to be boarded when it shut down yesterday afternoon. (I think it was about 2:30?) The group that was on the ride then said someone had fallen out, and a couple people were yelling something about their friend missing. (The Group was mainly special needs people so I’m not sure how much is true?) I heard one of the cast members say something about someone trying to get out of their seat.
They gave everyone fast passes for any ride in the park and that group stayed behind, so I don’t know what happened. Several people on twitter have been asking Disneylandtoday for updates. Just hope no one got hurt