The Boat Capsizes

Harrison is thrown around the tiny bathroom. When he finally lands, he looks up to see the toilet is above him and the ceiling is beneath him. This boat has capsized. So before he can even think, his body is reacting and he throws himself toward the bathroom's metal door. He somehow manages to get it open and escape into the hallway. Then a burst of water throws him down the hallway and sends him into another tiny bathroom. And just as this happens, the boat hits the ocean floor with a thud.