Summer excursions to amusement parks are supposed to be filled with laughter and thrills, but for one group of people on a log flume ride at Ohio's Cedar Point Park, their experience quickly turned into terror as their boat flipped over backwards while going up a lift, pinning many of them underneath, and injuring seven.

Operators of the ride, Shoot to Thrill, in Dorney Park's sister park, quickly shut it down as they rushed to help the fallen people, along with other park-goers and police officers. Witnesses said the passengers were trapped underwater for minutes as those who ran to their aid tried to pull the sideways boat off of them, UPI reported.

"We jumped in and helped them get out," Matthew Orr, a park-goer, said. "If we didn't help, I don't even know what would have happened. It took nine or 10 people to pull the car up."

The accidents causes mostly minor injuries, with six of the seven people treated at the park — the seventh person was taken to a nearby hospital for further treatment.

In a statement, Cedar Point said that state authorities were "investigating the incident."

"The safety of our guests is our number one priority," they said.

This accident occurred on the same weekend as another woman died while riding a roller coaster at Six Flags Over Texas. While riding the Texas Giant roller coaster, the woman reportedly fell out of the coaster while riding it with her children.

The coaster, said to be the tallest steel-hybrid roller coaster in the world, is 153 feet tall at its highest point, and has a drop of 147 feet.

"We are deeply saddened to share that earlier this evening an adult woman died in the park while on the Texas Giant," park spokesperson Sharon Parker said in a statement. "Park medical staff and local paramedics responded immediately. Since the safety of our guests and employees is our number one priority, the ride has been closed pending further investigation. Our thoughts and prayers are with the family and friends during this difficult time."

Seventy percent of amusement-ride injuries — and occasional deaths — occur during the summer months, between May and September. The Center for Injury Research and Policy of the Research Institute at Nationwide Children's Hospital found that between 1990 and 2010, 92,885 amusement ride injuries resulted in treatment at emergency rooms — amounting to about 4,423 injuries each year for children under 18 years old.

However, those that happen in amusement parks are much less frequent than those in malls or traveling fairs.

"Although the U.S. Consumer Product Safety Commission has jurisdiction over mobile rides (rides at fairs and festivals), regulation of fixed-site rides (rides at amusement parks) is currently left to state or local governments leading to a fragmented system," said Dr. Gary Smith, director of the Center for Injury Research. "A coordinated national system would help us prevent amusement ride-related injuries through better injury surveillance and more consistent enforcement of standards."