Quote from Phoebe in The One with the Ring
Ross: What was the deal with you and Chandler blowing us off before?
Phoebe: That was so weird, huh?
Ross: Why did you do it?
Phoebe: I didn't do it. It was Chandler. He's mad at you.
Ross: What? Why?
Phoebe: Oh, please. I think you know why.
Ross: I can't think of anything.
Phoebe: Come on, Ross. You're a paleontologist. Dig a little deeper.