[4K] Downhill Double Dipper Water Slide on an Inner Tube at Disney's Blizzard Beach.
"A retractable starting gate is all that stands between you and first place. Anticipation builds as you and your opponent wait on inner tubes at the top of twin enclosed waterslides. As rapids rush by, you exchange glances. Suddenly, the gates retract—and you’re off! Disappear into a black hole and plummet 50 feet downhill at exhilarating speeds. Hurtle through the dark then emerge into the bright light of day for the final splashdown." - Walt Disney World website