Joker’s Jinx, Six Flags America, Maryland, USA

The coaster valleyed stranding 24 passengers for five hours. The riders were given umbrellas to protect themselves from the sun. Some suffered from dehydration, but there were no major injuries. Source

oker's Jinx Six Flags America Maryland Accident
Rescuers free stranded passengers.

Star Flyer, T In The Park Festival, Balado, UK

The ride was emergency stopped by operators. The sudden stop appears to have been the source of the reported injuries and 15 people were treated on site for minor injuries. One other was transferred to hospital, but was later released. Source

Opa, Mt. Olympus Water & Theme Park, Wisconsin, USA

A 63-year-old man fell from the indoor wild mouse coaster and suffered head trauma that left him in a coma at the hospital for three weeks. Poor park maintenance and employee training were cited as the contributing factors for the incident. The coaster was removed and sold shortly thereafter. Source