A 10-year-old boy died after falling out of a river rapids boat and becoming trapped in the conveyor which lifts the boats back to the station.
Accidents
Theme parks and roller coasters are statistically very, very, very safe. Out of the millions of people who ride the thousands of rides every year, there are only a small handful of incidents. You are statistically more likely to be involved in an accident driving to an amusement park than having one at a park. The rarity of accidents is one reason why the media report them, similar to plane crashes.
Every important element of a ride is inspected on a regular basis and every ride is tested every day without passengers before it opens. A ride might not open, or a safety system might activate, if there is an imperfection. For theme parks to operate, they must obtain insurance and one stipulation is their rides are frequently inspected and signed off by a strict Health & Safety governing body. Every theme park does what they can to prevent accidents because the negative press would be bad for business.
Having said all that, theme park accidents still happen…
Dragon Challenge, Islands of Adventure, Florida, USA
Only weeks later after a similar incident, another rider was hit by a mystery object on the coaster. This time they reported being hit in the foot, arm and face which drew blood. Following the two incidents, Dragon Challenge will never duel again. Source
Dragon Challenge, Islands of Adventure, Florida, USA
A man riding on the front row of one of the two dueling Dragon Challenge coasters was hit in the eye by a mystery object, presumed to be a loose article dropped by a rider on the other roller coaster. Source
Excalibur II, Camelot, Lancashire, UK
A 12-year-old boy suffered serious but not life threatening injuries when he fell from the ride. Source
Surf Rider, Bottons, Lincolnshire, UK
Twenty-two riders were stuck for up to an hour when one of the rides axles snapped. One woman suffered serious injuries. Source
Ride of Steel, Darien Lake, New York, USA
A 29-year-old man fell out of the coaster and died. The rider was a war veteran and double leg amputee. Source
High Roller, Lostock Hall Carnival, Lancashire, UK
A girl suffered serious injuries including a fractured pelvis when she was thrown from the end seat of the ride. The owner was found to be at fault, after not adhering to a safety notice to close or modify the end seats.
WildCat, Cedar Point, Ohio, USA
Seven people suffered bumps and bruises when the coaster trains collided in the station.
Dragon, Legoland Windsor, Berkshire, UK
A worker fell from an unsecured walkway while performing maintenance on the coaster, breaking his shoulder and several ribs. Source
Black Mamba, Phantasialand, Brühl, Germany
A 48-year-old man suffered a heart attack mid-ride and was dead when the coaster train returned to the station. Source