this movie deal with time travel on a large scale . and like most sci fi film and it be easy to pick their theory apart ( especially after almost 25 year ) . i think that many of u have a tendency to over analyze these type of movie and when and in fact and we should just sit back and enjoy the experience . i first saw this movie at a drive in ( remember those . ) and and during one scene in particular and the entire crowd actually cheer . this be not a reaction i would expect from a large crowd during a bad movie . if you like sci fi and aircraft and and time travel movie and then ignore the nay sayers and watch this movie . it one of my all time favorite .