In the late 1970s, ski resort owner Gene Mulvihill transformed a mountain in rural Vernon, New Jersey, into a destination for thrill-seekers in the summer months. The result was Action Park, a one-of-a-kind amusement destination that left guests in charge of their own fun. In this exclusive excerpt from Action Park, new from Penguin Books, his teenage son Andy begins to realize that his father’s insistence on autonomy carries with it a measure of risk.

Emboldened by the success of the Lola race cars and their propensity to facilitate legal drunk driving in New Jersey, my father became preoccupied with growing out the entire motorized area of the park. If it needed fuel, it belonged here. He collected things that went fast and faster still, scooping up anything that could accelerate and filling up virtually every corner of the dedicated property with vehicles that guests could race or wreck.

From across Route 94, my ears partially obscured by the helmet worn while patrolling the skateboard park, I could hear the chants: “Wreck the boats! Wreck the boats!”

On a break, I walked across the road and stood out in the rain next to my older brother, Pete. We watched as people zipped around in speedboats that were roughly two-thirds the size of a full-scale version. Powerful engines that seemed way out of proportion for their flimsy plastic frames weighed them down. They populated a mucky-looking lake in Motor World with a small island in the middle.

“Why are they upset?” I asked.

“When it rains, we close down all the motorized rides except for the boats,” Pete said. “The lines get long. They get pissed and start to revolt.” Once someone got in a boat, he said, it was almost impossible to get them out until they ran out of gas.

The boats made a zipping sound as they looped around the island, noses pointed up in the air as if driven by junior cartel smugglers on the run from the Coast Guard. Two teenagers sped directly at each other, hair blowing back, bearing down on the throttle.

“Don’t do that!” Pete yelled. “Don’t you do that!”

The hulls collided with a thonk noise. Both speedboats began to capsize, spilling the occupants into the water.

“Serves them right,” Pete said.

One of them managed to get back into the boat and began cycling around the island again as Erin, the area’s traffic cop, tried to wave him in. The other climbed back on the dock, dripping with water and reeking of gasoline.

“There’s fuel all over my shorts!” he shouted. “My skin is burning, man!”

“Go to the office,” Pete said. “They have soap.”

Fuel and engine oil leaked from the motors, giving the entire lake a greasy sheen, like the top of a pizza. People who had been tossed into the water often started screaming. “Something brushed against my leg!” they would wail as they waded toward land, looking back as though a shark might emerge from the four-foot depths.

“Snakes,” Pete said. “Some of them are copperheads. We have snapping turtles, too. They can take a toe.” Doing laps in the boats first thing in the morning, Pete said, usually scared them off.

The relative sophistication of the motor-powered rides didn’t prevent us from installing low-cost attractions as well. Adjacent to the speedboat lake was a giant pile of hay bales that stretched more than ten feet in the air. They formed a winding labyrinth that resembled an obstacle course constructed for a rat in a laboratory. A sign next to it read: Human Maze.

A buddy of mine from school, Artie Williams, worked as the maze attendant. He was a good tennis player and read The New York Times every day without fail. These would normally be insufferable qualities for a teenager, but Artie managed to remain likable. He said he often heard muffled pleas for help from inside the maze. “People don’t understand it’s actually complicated and hard to get out of,” he said. “They think it’s like one of those things you draw a line through in a puzzle book. I wouldn’t go in without a rope tied around my waist.”

Snakes occasionally made their way into the bales, he said, popping out and causing people to sprint away in a mad panic, getting themselves even more lost than before. In the middle of summer, the bales also trapped heat, effectively turning the maze into a suffocating furnace. People emerged from the exit soaked in sweat and gasping. “Water, water,” they whispered, dry lips cracking. One of these disappearances actually made the local newspaper.

After a week, I saw a sign go up near the entrance:

DANGER

People Have Been Lost in This Maze for Up to 9 Hours

“It’s good to warn them up front,” Artie said, The New York Times tucked under his armpit.

As Motor World swelled, so did the rest of the park. New attractions seemed to erupt from the ground weekly, and other areas found new purpose. My father put in batting cages and basketball courts. The ski lift became the Sky Ride, a “scenic, 40-minute tour through the mountain landscape.” Trails of pot smoke surrounded the lifts. The race car mechanic, Mike Kramer, had cobbled together single-occupancy tanks that shot tennis balls at velocity at both guests and employees. It was Wimbledon meets Vietnam.

The concept of the Vernon Valley Fun Farm was already too quaint. The park was evolving, reflecting the increasingly rabid tastes of its patrons. The diesel-drenched success of Motor World and the failure of the comparatively serene skateboard park proved that people wanted speed and danger, competition and risk.

They did not want a fun farm. They wanted an action park.

Penguin Books

Excerpted from Action Park: Fast Times, Wild Rides, and the Untold Story of America’s Most Dangerous Amusement Park by Andy Mulvihill with Mental Floss senior writer Jake Rossen. Published by Penguin Books, an imprint of Penguin Publishing Group, a division of Penguin Random House, LLC. Copyright © 2020 by Andrew J. Mulvihill.