Forgetting Sarah Marshall (2008) was the movie that kept on giving. It gave us Jason Segel as a movie star, introduced the world (yay!) to Russell Brand, featured a spin-off for Brand's memorable Aldous Snow in Get Him to the Greek (2010), and led to Segel successfully rebooting The Muppets (2011).
That's a lot to accomplish, plus an instrumental version of Israel "Iz" Kamakawiwo'ole's iconic "Somewhere Over the Rainbow"/"What a Wonderful World" (which is appropriate, since the movie is set in Hawaii and, y'know, Iz was Hawaiian).
Instead of going on and on (as I usually do), let me just focus on my favorite scene from the movie: the puppet show.
I don't have a clip from the movie itself (the above comes from Craig Ferguson's since-ended late night talk show), but the song, "Dracula's Lament," expresses for itself that unexpected moment when you realize the puppet show that is so crucial to Segel's character is actually pretty awesome. It's the whole movie in a nutshell. You can watch the rest of the movie and kind of dismiss it as just another post-millennial comedy, but that song is what launched Segel's Muppets (which gave us the Oscar-nominated "Man or Muppet").