Accidents and casualties involving roller coaster riders continue to occur at Six Flags Magic Mountain, known as one of the scariest amusement parks in the world.

According to U.S. CNN on the 27th (local time), two female passengers who boarded the "X2" roller coaster at Six Flags Magic Mountain in Valencia, California, underwent emergency surgery for cerebral hemorrhage symptoms a week apart last month.

First, Pamela Guillen (40) underwent surgery for a severe subdural hematoma after riding the "X2," and she still has not recovered her speech and physical abilities, undergoing rehabilitation training to speak and walk.

Naomi Greer Wilkins (25), who rode the same ride six days later, also lost consciousness and underwent emergency brain surgery.

Wilkins remains in a coma and is staying in the intensive care unit.

Neurosurgeons who treated Guillen and Wilkins pointed out that "the severe brain damage is the result of the impact caused by rapid deceleration and acceleration while riding the 'X2'."

The "X2" is a representative amusement ride of Six Flags that runs at a top speed of 80 mph (128.7 km/h) over about two minutes.

Unlike other roller coasters, it features seats that rotate 360 degrees.

Concerns over the safety of this ride have not emerged for the first time recently.

According to court-submitted documents, the "X2" has been linked to about 10 cases of serious injury and hospitalization over the past 20 years.

Among them, two people eventually lost their lives.

Christopher Holley (22), who boarded this ride with his cousins in 2022, repeatedly hit his head against the back of the seat while riding, and lost consciousness immediately after getting off.

He was moved to a nearby hospital, but due to severe cerebral hemorrhage, he died in less than 10 hours.

The coroner determined the cause of death to be blunt head trauma caused by the ride.

Afterwards, California state authorities ordered the suspension and inspection of the roller coaster, but maintenance staff reportedly secretly replaced one of the train wheels before the inspection, and authorities allowed it to resume operation just days later.

Before this, in 2010, Hilda Faria (28) also died after riding the "X2".

At the time, medical staff determined that a part of the brain had ruptured due to the violent movement of the ride.

Injuries also followed consecutively.

Selena O'Neill (17), who rode the "X2" in 2014, was diagnosed with a subdural hematoma with blood pooling on the surface of the brain at a hospital after suffering a seizure, and Sheila Katerelos (50) in 2020 also visited a hospital feeling dizzy after her head was strongly hit during the ride, and was diagnosed with brain damage and multiple subdural hematomas after being hospitalized for five days.

Despite these continuous accidents, Six Flags has not suspended the operation of the "X2" and has instead promoted it as a flagship ride.

Six Flags suspended the roller coaster operation only on the 12th of last month.

However, citing that there are warning signs stating that any ride can carry risks, the company emphasized that the passengers rode at their own risk.

The California state government is currently investigating safety issues and has not responded to specific details.

(Photo: Getty Images)