When Chandler puts his hand on Eddie's arm you can clearly see part of Matthew Perry's middle finger is missing. He lost it when it was accidentally shut in a door when he was 3-years old.
The scene when Joey goes into Central Perk excitedly to tell Phoebe about his interview with the soap opera magazine had to be shot several times. The first time Matt LeBlanc wasn't looking where he was going and fell. The second time LeBlanc was intent on not tripping and looked down. The third he got to the area where they sat, but knocked the chair over. The fourth time Matthew Perry got into the action and when Matt LeBlanc got to the chair he ran up behind him.
When Dr. Ramoray falls down the elevator shaft, his 6 second fall means he fell approximately 580 feet before hitting the bottom, or about a 50 story hospital.
During Ross and Richard's argument on who is right about The Deer Hunter (1978) and Coming Home (1978), Richard is correct. Deer Hunter was John Savage losing his legs, and Coming Home was Jon Voight as paralyzed.
James E. Reilly, the writer who wrote Joey's character out after he read in Soap Opera Digest that Joey wrote most of his own lines, was a writer for Days of Our Lives (1965), as well as General Hospital (1963) and The Young and the Restless (1973). He was the head writer in the majority of the Days of Our Lives episodes from 1992 to 2006. Reilly died October 12, 2008 at age 60 from complications after cardiac surgery.