I caught this while I was on the chat room last night! Also, I managed to videotape it..... Yeah, since Rachel had to say a line, at first the tickling was mostly fake, especially by Amy Poehler, but after she says the line it looked like Anna Gastheyer was really doing a knee tickle, and a few of Rachel's jerks looked real. It appeared Tina Fey got in a few real underarm/side "hits " as well (I've been watching the scene over and over just to see - it's kind of like "our" Zapruder flim) .... I think it was mostly fake, but some real tickling was there... anyway, it's the thought that counts. When I saw the beginning of this scene Iw as like "please have a gang tickle fight, please!" And it happened! (BTW, in Josie and the Pussycats, Parkey Posey mentones that she was never popular as a child and always wanted to have sleepovers...."and have ticklefights!" I wonder if this inspired the scene?). And even thought there was no tickling, Kirsten kicks her foot up at one point and it's such a pretty sight!
Interesting, the NEXT scene had Kris Kittan mentioning that he's put his "brother" (Chris Parnel) through many tickle endurance sessions. Not my cup of tea, but it did seem there was a theme going that night. This will probably be rerun in 3 or 4 months....