Ted gets home. There's nobody in the apartment. He puts down his work bag and climbs up to the roof through the fire escape as melancholy music plays. Cut to the limo. Barney is going to take a drink, but stops himself. Cut back to Ted. On the rooftop, everyone yells surprise. Ted smiles and nods.
We return to the bathroom and the goat. "Oh, right, the goat!" SagetTed says. Yes, the goat. Explain the fucking goat already. We see the goat chewing on a pink towel. SagetTed says this is funny and they're going to love this. He says later that night, the goat locked herself in the bathroom and was eating one of Robin's pink towels. He stops himself. "Wait a minute. Robin wasn't living here on my 30th birthday. When did this happen? Oh, wait the goat was there on my 31st birthday! Sorry. I totally got that wrong." And we cut to black. Seriously. That's it. No awesome goat joke. Just a hint that Robin will be living there in another year. However, this doesn't mean she'll be moving in with Ted. It could be that Ted is moving out and Robin is taking over the apartment. I mean, who wouldn't want to live above MacLaren's? So all the goat stuff didn't even happen this year? Then why was the goat there while they were waiting for Ted to show up and they had the conversation about Barney and Robin? SagetTed, you, sir, an unreliable narrator! Good night to you! I SAID GOOD NIGHT, SIR!