Where is the climax of "Greasy Lake"?

There are several places in the story that you could argue are the actual climax.  In terms of the action, you could point to the entrance of the other car that scares the boys out of their plan to rape the girl they are with, you could also point to the narrator's run in with the actual body in the lake, a truly shocking moment perhaps more powerful than others in the story.  You might also look to the boys being labeled as "pretty bad characters" by the girls that show up, and their dismissal of the label as one they wouldn't like, though of course they would have loved to have been labeled as such just a few hours earlier!