What is the climax of Blue Velvet?

We were asked this question in class recently and while watching some of the clips over again I realized that Jeffrey did not respond to the line, “You’re like me". Jeffrey didn’t punch Frank after he said that, he punched Frank after Frank started groping Dorothy. Jeffrey in directly responded to Frank’s comment but he directly and immediately responded to seeing Dorothy being victimized by Frank and embarrassed in front of all the people in the car. This is the first time Jeffrey makes an active decision to do something and take action. Turning points in films are often focused on a character’s action every 30 minutes or so. And so I had to ask myself, did Jeffrey really punch Frank when Frank said “You’re like me” and no he didn’t. He just sat there but then when Frank started molesting Dorothy, that was the catalyst where Jeffrey said, “Okay I can’t take this anymore” and he reacted with violence. Now, to take this a little further, every movie has two plots at least the good ones anyway; an emotional plot and an action plot. So one could argue that Jeffrey’s emotion plot deals with his confliction of feelings about his repulsion to Frank and that when Frank said, “You’re like me”, it really hurt him emotionally and then when he saw Frank groping Dorothy, that was a representation of the action of the story and he reacted to it with action. So in a sense, this scene was the climax of both plots; action and emotion.