Northern New Jersey was once home to the most insane amusement park ever built in the known galaxy. Action Park was a near free for all with a laissez-faire attitude the likes of which will probably never been seen again. Here is the story of how it came to be.
“A lawless land that was ruled by drunk teenage employees, frequented by even drunker teenage guests, and filled with rides that seemed to defy even the most basic notions of physics and common sense.” – mashable.com
More proof Here
Skip to 8:20 mark to see the upside down slide.