"I Realized I Was Eric"
JA: In the beginning, we always had a few scenes that we knew weren't written as well as they could be. On the set, we'd just let them keep going with them. If Loudon Wainwright [who plays Hal] has to complain about women, then we know we're going to give him an opportunity to ramble for five minutes and we'll just steal lines from it. But as the show progressed, it was taking so much time to do it that we started only doing it in very specific moments. ["For those who prefer to be spoiler-free, the gist of what he says next is that he let a guest star (in what will be the third-to-last episode) improvise his lines much the way he did with Loudon." -- Heathen]
H: Is that how the Maxim speech came to be?
JA: No, that was actually one we had written out.
H: Are there any particular moments where you recall the actors improving a scene by improvising it? I skimmed the scripts that are available online and noticed that in "Hell Week," the stuff about Ron thinking Heath's catalog photo was Meg Ryan isn't in the final draft.
JA: That was improvised. Almost the entire scene with Matt [Taint] yelling at Samm Levine about being obsessed with pickles was improvised. We kind of wrote a short version of that on the spot, and told Matt to get really mad at him, and he came out with such witty gems as, "We're a frat. We drink beer." What else is improvised?
Nick Stoller: Everything Jason Segel....