My wife and I laugh every time we hear certain lines no matter what context they are in. For instance, a nuclear bomb could go off in a movie killing thousands and one survivor might say to another who is holding a phone "Who you gonna call?" and we'd die laughing!
Here are my additions to the retired lines hall of fame:
1-- Who you gonna call? (Ghostbusters)
2-- It's just a flesh wound! (or anything with the words flesh wound) (Holy Grail)