An added thrill makes this water slide stand out from all the others. There is one twisting turn only a skateboarder would know how to handle. It starts with a gentle slope up, then goes up too much, leaving the rider upside down or sideways. Some of them bounce around a little, until they can get their bearings. Some of the riders recover beautifully, leaning with the curve, not against it.
Their squeals of glee can be heard heading on down the water slide. The sleds with one or two people are most prone to turn over.
Sleds with three or more generally make the turn with no trouble. An uncomfortable ride is a given for the upside downers. The sideways riders stay that way if they cannot recover themselves. One or two manage to turn over and do the ride right side up. The side riders might be alright. It just was not the ride they were expecting.
The upside down riders usually lose their sleds completely. They are not only facing down on the water slide, they must also fight the sled for supremacy as they go bouncing down the slide together. A knowledgeable water slider would know to kick off at the turn, as soon as they saw it coming. That is called a learning curve.