I've often said Chandler's character was the best part of the series. And in this episode-he gets to show why. After Joey moves out of the apartment, Crazy Eddie moves in. And all of his personalities with him. Chandler's reactions to his new roommates antics are classic. My personal favorite clip is when Chandler comes home to find Eddie dehydrating fruit.
Throughout the episode, his behavior gets stranger and funnier. It all culminates to Eddie coming home to the locks changed. He finds Joey already moved in, even though he'd lived there earlier in the day. And-of course Chandler convinces crazy Eddie he never lived there. Funny as hell!