Usually it's one or two sequences from movies that step up from really funny to doubled-over-almost-falling-out-of-chair funny; almost no films can sustain that level for more than one sequence in a row. Maybe more than one sequence if they're separated, but again, hard to sustain. This Is Spinal Tap and the other Christopher Guest comedies often come close to constant hilarious, but of course certain moments transcend, like the payoff to "Stonehenge." Other sequences that utterly collapsed me were the bag-of-pot dream sequence in Harold and Kumar Go To White Castle and, to use a TV example, the Invader Zim gag involving Mars, Earth and a soda can. And I've mentioned before that I laughed so hard at Raising Arizona's chase scene that I started to unsettle my stomach.
Add the extra ingredient of "OH DEAR GOD" to a comedy, which I also can apparently handle, and that might make it more hilarious, because I laughed, laughed, laughed at The Aristocrats, the documentary on what's supposed to be the most offensive joke ever. I saw it in a packed theater on what was an emotionally hyped and difficult weekend -- end of August, 2005, you do the math -- and I was GASPING for large parts of it. Alternately roaring with laughter and screaming in a "MY GOD THEY WENT THERE" way.
Day 25 - A show you plan on watching (old or new)
Band of Brothers and Deadwood, both of which I can borrow from my Dad. I will also try new-school Doctor Who and probably eventually Torchwood, considering how surrounded I am by Whovians who like talking about those shows.