Okay, let’s see…
The gang is going to the 35th Anniversary party of Mr. and Mrs. Gellar. Monica says that Ross always gives a beautiful speech and everyone cries because it’s so wonderful, yada, yada. So she decides that she’s doing the speech this year. Phoebe is bringing her new boyfriend Parker (Alec Baldwin). Parker arrives at the apartment to pick everyone up and he’s super-annoying. He’s really positive about everything (“We’re going to a party! Oh boy! This is gonna be great!” --that sort of thing).
They get to the party and Ross and Rachel realize that Mr. Gellar has told people that R&R are married, so they decide to play along for the night. Family friends are giving them gifts (checks) and asking about the ceremony. Rachel makes up a story about being married on a cliff (I think in the Caribbean). She tells tham that a dove slipped the ring on her finger, and that her lace veil was made by blind nuns (they weren’t blind originally, you see, but the work on the veil was very intricate, so, you know…) Ross suggests that they could say that he rode up on a Harley, but Rachel tells him that would be totally unrealistic. He then tells everyone that he proposed in the planetarium. The story goes that he had “Just the Way You look Tonight” playing on the sound system and the words “Will You Marry Me?” spelled out in the stars. Rachel is very moved by this, and tells everyone that the diamond was the size of her fist.
Parker is annoying the crap out of everyone (“This evening is so perfect, I need to take a mental picture!” --I cannot acurately do justice to his delivery…it’s hysterical). The gang starts making fun of him just as Phoebe walks up. She’s very upset. Later, though, she realizes how annoying he is and breaks up with him. That scene is great, too. She tells him she can’t see him anymore and he gets upset. She eventually gets him to leave and he pops back in to say, “Wasn’t that the best fight you ever had!?”
Monica delivers her speech, saying that she knew she could get married because of the example set by her parents. In an effort to get everyone to cry, she talks about “those who couldn’t be here” such as her dead “Nana” and their old dog. Everyone is unmoved. Ross then gets up and says that he admires the strength of his parents’ marriage. There’s not a dry eye in the house, and Monica, of course, is annoyed.
Later at their apartment, Rachel asks Ross where he came up with the idea of the planetarium proposal. He says he always imagined it would be how he would propose to her, had they not broken up. She is obviously moved.
That’s about all I remember. I’m sure that if I forgot something, someone will mention it.
(On preview, I see someone else has posted, but I’m submitting anyway, since I went to the trouble of typing it out.)