http://en.wikipedia.org/wiki/The_Butterfly_Effect,
http://www.youtube.com/watch?v=4hrV9xt50Vc,
http://www.imdb.com/title/tt0289879/
An interesting movie with a dark & fascinating premise.
http://movies.stackexchange.com/questions/8242/butterfly-effect-what-was-the-original-ending-and-why-was-it-changed
editing effects
http://www.youtube.com/watch?v=7Cz2Wn2-Aeo
http://www.youtube.com/watch?v=T8zO9rDKmyA
http://www.imdb.com/title/tt0289879/alternateversions,
http://www.youtube.com/watch?v=OqKWxAmOLaM,
http://www.moviemistakes.com/film3957/questions