(Sylvia singing The future is coming while Marty enters the expo and see young Doc working on his flying experiment up top so he runs up there)
Marty: Emmett!
Emmett: Michael! You came back to see me perform my flying experiment! I hope mom and pap will approve of this.
Marty: Don't worry Emmett. Take what I told you seriously about not being afraid to stand up to them.
Emmett: I'm thinking about it but I'm not sure it will work out.
Marty: Of course it will work out. They'll change their mind afterwards. And you really need to break up with Edna. She's not what you think she is!
Emmett: What are you talking about? She's not that bad.
Marty: Fine. But I'm telling you that you will totally regret it later.
(Marty walks down towards Danny Parker Sr. and Edna talking)
Marty: Officer Parker!
Danny Sr.: Michael you came back!
Marty: Of course I came back to warn you about Edna. She's not what you, Emmett, and everyone else believe she is.
Edna: What? That's not true!
Marty: Oh yeah! I will find a way to prove you! (walks towards the phone booth and calls Edna)
Edna: Hello who is this I am speaking to?
Marty: (In a deep tone of voice) This is the Sacramento crime gang calling you to provide evidence on who burnt down that speakeasy back in June. (Starts recording her voice with the recorder)
Edna: Why it was me who did it. I did it to bring justice to Hill Valley! The end of booze, sin, and debauchery will be done and over with! Why do you call?
Marty: We were curious if you knew who did it since we like to keep track of crime all across the state of California.
Edna: And you wanted to know about all those speakeasies and alcohol establishments i've burnt down for the past few years? How sweet. You won't mention this to the Hill Valley or any state of California police will you?
Marty: Of course not so have a nice day. (Hangs up and stops the recorder)
Marty: (At top of Emmett's experiment as he just finishes) Emmett! I got bad news on Edna! (Pulls out the recorder and plays it)
Emmett: (scoffs) Nonsense Michael! Edna would never do such a thing like that! You're just making things up! So get out of my way!
Marty: Emmett I'm not making this up to make you mad! It's really true!
Emmett: Oh yeah! Then how did you find out?!
Marty: I used the phone booth to call Edna and find out the truth of her!
Emmett: Get out Michael! Your faking things cuz you don't like us together! Now go or I'll call security to kick you out! (Marty runs down)