Hilarious in Hindsight: That Jimmy Fallon episode that aired on Family Guy? About six years later (in 2011), it became a reality, only (a) the musical guest was Michael Buble, not Seth MacFarlane (in fact, Seth didn't host an episode until the fall of 2012 [seven years after this episode aired], so that's a double whammy for Hilarious in Hindsight), (b) Jimmy Fallon didn't have sex with someone in the cold opening, (c) Jimmy Fallon didn't crack up in any sketch for his episode (and Fallon even recognized the error of his ways), (d) the real Jimmy Fallon episode was a Christmas Episode, and (e) the end joke with Brian doesn't make much sense now since Showtime at the Apollo doesn't air after SNL at 1:00 a.m. anymore on NBC (it's either infomercials or a magazine show about city nightlife and restaurants).
We're Still Relevant, Dammit: The Family Guy writers mocking Jimmy Fallon for his Corpsing on SNL — in June 2005 (which was after the show completed its 30th season and before the show would refresh itself by broadcasting in high-def and hiring Bill Hader, Andy Samberg, and Kristen Wiig as the new feature players [after firing Rob Riggle and keeping Jason Sudeikis]). Sort of justified in that Family Guy was still canceled in 2004 and was trying to catch up with the times, but all the jokes about Fallon and his inability to keep from cracking during SNL sketches dried up as soon as he left. Even The Simpsons' Take That against Jimmy Fallon (on the season 16 episode "Homer Away from Homer"note the episode where Flanders moves away after Homer tells everyone that Flanders is housing two college coeds who are filming softcore webcam porn) was timelier than this.