Cannonball Loop was an enclosed water slide located at Action Park in Vernon, New Jersey, USA. The ride was built by GAR in the mid-1980s and featured a 360 degree vertical loop, more commonly associated with roller coasters. The Cannonball Loop has come to symbolize Action Park for it's extreme thrill seeking, but was almost never used due to countless injuries and other problems. Employees have reported they were offered hundred-dollar bills to test it. Tom Fergus, "one of the idiots", said "$100 did not buy enough booze to drown out that memory."
It was opened for one month in summer 1985 before it was closed at the order of the state's Advisory Board on Carnival Amusement Ride Safety, a highly unusual move at the time. One worker told a local newspaper that "there were too many bloody noses and back injuries" from riders, and it was widely rumored, and reported in Weird NJ, that some of the test dummies sent down before it was opened had been dismembered. A rider also reportedly got stuck at the top of the loop due to insufficient water pressure, and a hatch had to be built at the bottom of the slope to allow for future extractions.
The ride supposedly reopened a few more times over the years. In summer 1995 it opened for several days before a few more injuries forced another shutdown. Those who did ride it have said that more safety measures were taken than was otherwise common at the park. Riders were weighed and hosed down with cold water, required to remove jewelry, and then carefully instructed in how they had to position their bodies to complete the ride.
For the remainder of the park's operation, Cannonball Loop was still visible near the entrance of Waterworld. When the park closed, the slide was taken down and it has never been rebuilt.