Jurassic World: Fallen Kingdom Pool Float
In a strange cinematic and evolutionary twist, the next Jurassic Park sequel will feature a water-faring T-Rex whose genetically modified donut center will keep him afloat, but whose unmodified arms will prevent him from swimming any faster than the slowest member of a seniors water aerobics class. They'll call it a built-in safety feature for the humans!
Also, if you can manage to jump into or rise up from under the dinosaur dead-donut-center, he'll let you ride him!
Approach from the front, sides, or back, or miss the target though and, as per usual, he'll eat you.