This is a parody, and is not endorsed by Cartoon Network, or the people who make Steven Universe. This is purely for fun.
You jinxed it, Jake.
I think there might be a mistake on Panel 2. I might be wrong but it seems like Betty and Bonnie's bubbles are the wrong way round unless I'm missing something...?
No, that is actually the right way around. Bonnie didn't want to be the one to kill them by drowning and Betty asked if anybody would.
For some reason the last panel made me imagine the worm jumping out of the water, shouting "cannonball," and attacking them. That lead to a dnd character concept that uses other diving-themed named attacks... Why oh why must I have so many odd character concepts I'll never get to use!