I have been looking for this movie forever. It's kind of like the butterly effect but instead there is this company that for a fee will take you back to dinosaur times and allow you to walk a trail. But a man wanders off the trail and accidentally steps on a butterfly. Well chain of events lead to the entire earth in today's time evolving backwards. Please help if you know this movie title. Thanks:)

You have no idea how much this bugged me trying to remember the name!! Haha

A Sound of Thunder

A Sound of Thunder (film) - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/A_Sound_of_Thunder_(film))