What is this film?????

[coget]

Hi,
Saw a film trailer about 2 years ago. It was set in some kind of lab where you could go back in time, only you had to stay of a metal pathway and not venture of it. Someone steps of it and crushes a plant ( i think) and the whole of evolution changes and suddenley the lab is covered in foliage. Never heard any more about it. Any ideas?

[Mattk]

A sound of thunder

a truly awful film

[kempie]

http://en.wikipedia.org/wiki/A_Sound_of_Thunde r_%28film%29