looks more to be like a person laying flat with the person treading water. You can see his knees bending and then his yellow sneaker sole pop up.
not a snow boot its a sole of a sneaker
Start at 9.59 and watch it at .25 speed. It's clearly a person laying flat treading water and the woman is holding the person hand. What is being said is a divers head is the person knee flexing out of water and then you see the yellow bottom of his sneaker pop up.
Yes thank you! slowing it down is the only way to notice it.