Hi I cant remeber the movie name or the story but i do remember some secens i think th movie came between 2002 and 2006.
this is something that happened when the main character went for rafting with his friends but had a accident when he comes back the reality keeps changing
first scene i rember is
car is being driven on a bridge but suddenly a wave comes and bridge vanishes (it was something around the lines of that the bridge was never made is this reality)
Second scene i could remember is
main character comes home after buying gift for his daughter which is the only child he thought he had but when he comes home she told him that he forgot gifts for his son
Later when he brings gifts for his son and daughter wife tells him that he never had a son.