"Highlander II" is why the phrase "There can be only one" also applies to movie sequels. There is only one Highlander movie, the original (and the international cut at that, not the US one).

Same with Matrix, there is only one Matrix movie, there is some internet rumor that there were create two sequels, but I refuse to believe it!

"Truman show" I'd rank up with the topic. It's a Jim Carrey movie, so you expect slapstip humour but the movie is most excellent.