When Ross and Joey are at the Central Perk, Joey pulls out a Master Card and says he has Chandler's credit card. In a later scene, at Joey's apartment, Chandler pulls his credit card out of Joey's back pocket. This time it's an American Express.
The first card Joey pulls out at Central Perk is a Mastercard. Gunther runs it, but it gets declined. Joey realizes it's his own card, and gives Gunther another one, which is Chandler's American Express card.
The first card Joey pulls out at Central Perk is a Mastercard. Gunther runs it, but it gets declined. Joey realizes it's his own card, and gives Gunther another one, which is Chandler's American Express card.
When Joey and Ross are in the Monica's kitchen, Joey offers to share his pizza with Ross. Joey doesn't share food.
When Rachel comes into the apartment while Paul is writing down his feelings, she places her purse and a brown bag on their sides on the counter. They remain on their sides until the very last shot when Paul approaches Rachel at the end, and then you briefly see both the purse and bag standing upright.
In an earlier episode titled "the one with the girl who hits Joey", Chandler proposes at the end of the episode and already has a ring. So, why in this episode does he need to purchase another one.
When the Phoebe is trying on the jewelry and the revolutionary war musket, she asks the jeweler to try on the ring that her friend picked out. He asks for the "1920s princess cut ring" from the other jeweler who just sold the ring. The diamond could not be original to the 1920s ring since the princess cut was not developed until the 1960s