Phoebe Buffay: Ross, could you just open your mind, like, this much? Okay? Wasn't there a time when the brightest minds in the world believe the Earth was flat? And up till 50 years ago, you all thought the atom was the smallest thing... until you split it open and this whole mess of crap came out. Now, are you telling me that you are so unbelievably arrogant that you can't admit that there's a teeny, tiny possibility that you could be wrong about this?

Ross Geller: There might be... a teeny... tiny... possibility.

Phoebe Buffay: I can't believe you caved.

Ross Geller: What?

Phoebe Buffay: You just abandoned your whole belief system! Before, I didn't agree with you, but at least I respected you.

Ross Geller: But...

Phoebe Buffay: How are you gonna go into work tomorrow? How are you going to face the other science guys? How are you going to face yourself? Oh...

(Ross is shocked and leaves...)

Phoebe Buffay: That was fun.