As you finally reached the top of the slide, you could see one of the employees give the customers golden tubes as if she spray painted them before everyone arrived at the water park, which meant that it could be the reason for what was going on. By the time the last customer got her tube, it was your turn.
Unfortunately, you were too nervous to go down the slide, while using the tube, because not only were you worried about growing gills, and scales like the rest of the customers at the waterpark, but you were also worried you could fall off. So as a safety measure, you place the tube on the ground, and sit on it. To help give you a little push, you see the employee that gave you the tube as she pushes it forward to where the other customers slid down the slide, while you also manage to go down.