The Butterfly Effect.

First one was good, 2 and 3 can suck my balls.

 

The second and third are almost completely irrelevant to the idea that made the first one successful.

I enjoyed the first one, but can't be bothered to see the other two. Here's two alternate endings to the first one:

#1 - Kind of sad:



#2 - Happier ending

 

First one was pretty good the rest kinda got off track =\