This is one of those episodes that are different to other episodes and do not follow up on the storyline, it's totally opposite of the 6 friends lives.
This episode is special and also a good one to sit and watch, unfortunately I missed the first part which I reccomend you watch first.
Phoebe becomes a nasty and bossy workaholic,Joey is a 'famous' actor, Rachel is his biggest fan, Monica is really fat but still manages to look cute,Chandler becomes a scruffy writer and Ross tries to patch things up with his homosexual wife and he is also talented in Karate.
The best part is that the intro is different than normal as if to show life as their ways in this episode.
I haven't decided but this could be one of my favourite episodes of Friends.
This is very worth watching.