just watch an old movie called The butterfly effect, i like the storyline, turns out i really into this kind of movie that kept my mind busy all the way till the end story and said "ah..., i see..", but ofcourse The Others still the only movie for me that made me said the longest "ah........." :p
In the movie, theres a guy named Evan, that can actually "redo" some of his action in the past by trying to remember it, and suddenly he'll get transported into that moment and possesed his past form (my tenses is starting to break here..), and change it. From saving his beloved friend, dogs, neighbour, mama, etc.. he get to a conclusion that no matter what changes he'd try to achieve theres always an unintended consequences, he always losing something. Hmm.. i remember a phrase from that movie "You cannot play God!", yep.. imagine if we have chances to change the past, and alter the writen story of life, I cannot imagine what chaos we'll make. you all know "Back to the future" right ? when i was a kid watching that film, and thinking that it would be so cool to travel through time, and now after watching The Butterfly effect, if someone knock at my door and say "Hi!..How would you like to change history?", emmm.. i would think twice(even more)...
And as usual, got curious bout the theory, and do some wiki on it, and found out that the initial theory emphasis on a very small initial event(virtually undetected) in one place, that may cause chain-affect over time and at some point in the future projected into something really BIG(virtually, significantly detected) happening in various places in the world, Had the initial event never took place, the result in the future might have been REALLY different. So theres a slight different between the movie and the original theory, because everytime Evan change its past(go back to the past), what he did is actually significant and noticeable, and we all know that those actions will surely affect future(don't have to be a professor to know that). But the main idea still the same, whatever you did now even the slightest, no! i mean especially the slightest, will determine what you'll get latter BIG TIME!
moral: be more sensitive, and watch your step :)