Aunt May: What happened to your face? It's filthy
Peter Parker: It is?
Aunt May: Yeah!
Peter: Oh yeah, I was cleaning, the chimney.
Aunt May: We have no chimney.
Peter Parker: Whaaat?
Peter Parker: You want me to come down there so you can kill me?
Aleksei Sytsevich: Yeah!
Peter Parker: OK, I'll be right there.
Electro: I will control everything, and I will be like a god to them.
Spider-Man: A god named Sparkles?
Cab driver: It's Spider-Man!
Gwen Stacy: Stop the cab.
Cab driver: Lady, I ain't even moving!
Harry Osborn: You're a fraud, Spider-Man!
Peter Parker: Everyday I wake up knowing that no matter how many lives I protect, no matter how many people call me a hero, someone even more powerful could change everything.
Electro: It's my birthday, now it's time for me to light my candle!
Norman Osborn: I don't expect forgiveness from you, anymore. I don't believe in miracles. How could you possibly understand that your childhood had to be sacrificed for something greater. Not just for me, for you! Have your hands started to twitch yet? When you lay awake, you feel it coming? Hiding under your skin. Waiting to show itself. To show who you really are.
Norman Osborn: This is not how I've imagined how I die, looking at my son, seeing a stranger, you have so much potential Harry, such fierce intelligence and you're throwing it all away!
Harry Osborn: What is all this stuff?
Donald Menken: The future.
Harry Osborn: I want you to make Spider-Man bleed!
Green Goblin: Heh... Peter! When you said Spider-Man said no, you meant you said NO!
Harry Osborn: C'mon, everybody wants my money!
Aunt May: I once told you that secrets have a cost. The truth does too.
Electro: Soon, everyone in the city will know how it feels to live in a world without power, a world without mercy, a world without Spider-Man!
Peter Parker: You know what it is I love about being Spider-Man? Everything!
Answer: Peter could have webbed him up and called the police anonymously.
MasterOfAll
Very likely. However, there was a deleted scene in which Peter, out of anger over Gwen's death, almost beats Harry to death.
Yes. We also see Goblin getting knocked out when all hell breaks loose, and the gears all break apart. Chances are, Peter just webbed him up. (Although, as the other response says, he also got beaten up in a deleted scene.)
TedStixon