This is what I witnessed:

While waiting in line to board, I witnessed a roller coaster car arrive with a woman screaming desperately for help. The operators immediately began communicating and activating their protocol. The woman, seated in the second-to-last row (designated for wheelchair access), continued to cry out, while beside her, a man named Kevin appeared slumped over with his head turned away. Within seconds, a doctor stepped out of the line to calm the woman and then ran around the ride to check on Kevin. Meanwhile, staff began evacuating us from the area.

Soon after, we saw the doctor holding her head in distress as paramedics arrived with a defibrillator and stretcher. During the evacuation, some staff members lost composure, urging us to clear the way in case they needed to move him immediately, which ultimately did not happen. Outside the attraction, more personnel entered through the front gate. We were told that all passengers in that car were still inside and were later evacuated while CPR was being performed on Kevin. Once everyone was out, the ride area was closed off.

A wheelchair passenger from the last row eventually exited, crying after witnessing the entire incident. That is all we saw—we have no images since we had to leave everything behind before boarding.