Quote from Ross in The One with Monica and Chandler's Wedding (Part 1)
Ross: No, it's not that. Now, what I'm going to say to you, I'm not saying as your friend. Okay, I'm saying it as Monica's older brother. Chandler: But you're still my friend? Ross: Not for the next few minutes. Chandler: During this time, are you still my best man? Ross: No. Chandler: Do I still call you Ross? Ross: Okay. You guys are getting married tomorrow, and I couldn't be more thrilled for both of you. But as Monica's older brother, I have to tell you this: If you ever hurt my little sister, if you ever cause her any unhappiness of any kind, I will hunt you down and kick your ass. [Chandler laughs] Ross: What? I'm serious. [Chandler laughs] Ross: Hey, dude. Stop it. I'm not kidding here. Chandler: Okay, I hear what you're saying and thanks for the warning. Ross: No problem. Chandler: So are we friends again? Ross: Yeah. Chandler: Okay. You won't believe what Monica's older brother just said to me!