Big and significant difference in 1st + 3rd
i never watched the butterfly effect2, but i saw the first one with ashton kutcher. one major thing that this movie left out was when sam comes back from his time travel, all the events that happened subsequent to what he changed was all forgotten. after every jump he goes through, he has no idea where he is when he returns to the present. but in the first "the butterfly effect," when ashton kutcher comes back, he has a small seizure and then remembers everything that happeend before and after he jumped, which is why after every jump, he packs about 40+ years of memory into his brain. however in this movie, they said nothing about what sam remembers after he time travels. this leaves a lot of holes in the movie. and why does he marry elizabeth in the end? i thought he was with rebecca
**spoilers*** i'm still confused as to how the sister is able to time travel together back with sam, there were a few times when he did it alone.