Eyyy so my theory #2 got confirmed, Rai collided with the bubbles in the air which were spinning. Thank you for making that clear.
I feel like Dogpark makes some of the line delivery more natural but honestly this is JoJo so I fully expect everyone to talk like they're narrating a baseball game.
Just guessing here, and I'll double check when the other translation comes out, but I believe the way Mamezuku died here was because Josuke had placed soap bubbles inside the walls, so that when Rai attacked the wall the bubbles travelled up his arm into his body, and then popped out taking...