Amusement parks are designed to deliver thrills. They are places for splashing and screaming and laughing, often on rides that defy common sense, not to mention the laws of physics.

But a park in New Jersey routinely delivered a lot worse — bloody noses, bruises, broken teeth and bones, concussions and even death. People who spent a day at Action Park in its prime, in the 1980s and 1990s, often left with something to show for it: scars.

“People were bleeding all over the place,” said Susie McKeown, who is now 52 and remembers going to Action Park after she graduated from high school more than 30 years ago. “People were walking around the park with scraped elbows or knees.’’

She went home with her own badge of honor, having broken one of her front teeth on a ride that ended with a 15- or 20-foot plunge into a chilly pond. “You went so fast that if your chin hit the water at the wrong angle, you chipped your teeth,” she said.