The One Where Emma Cries - S9-E2
Corrected entry: In the episode where Rachel comes home from the hospital, she and Ross realize they forgot diapers. Ross goes out to get them, and a muffin for Rachel. Soon after he closes the door, Emma starts crying. A little while later, they come back to the scene, and Emma is still crying. Phoebe said Emma had been crying a few hours. They jump to the scene where Ross is getting Rachel's muffin. He had just gotten back from getting diapers. It took him a few hours to go get diapers?
Correction: Ross stops to get Rachel's muffin and runs into Joey who tries to get him to hit him. When Ross tries to hit him, Joey ducks and Ross hits the pole behind him. They then go to the hospital emergency room, which takes several hours.