Friends Season 10 Episode 7..This is the scene where the adoption lady comes to visit Monica and Chandler.
Joey: Guys? Everything ok? It's me, Joe...
Chandler: (Screams to interrupt Joey) AAAAAAAAAAAAAAAAAAAAA......AAAaaa-doption!!
Laura: What's going on?
Chandler: Oh, just like I said. That crazy... Bert... roaming the halls. (Joey bangs on the door again)
Monica: Keep on roaming Bert! We don't want any crazy today!
Joey: What's going on?
Chandler: WE'LL TALK TO YOU LATER, BERT. EVERYTHNG'S FINE!!
(cut to Joey on the other side, who finally leaves the door and goes to his apartment)
Joey: Everything doesn't sound fine!
Laura: Is he alright out there by himself?
Chandler: Oh yeah! He has a caretaker. His older brother... Ernie.
Laura: Bert and Ernie!
Chandler: (nervous smile) You can't make this stuff up!
Why does Chandler say you can't make this stuff up when everyone knows about the sesame street muppets? What does chandler mean by that?