That is definetly one of my top 3 favorite movies. Ive been in love with bttf ever since i first saw it when i was like 6 or 7. Although there are some contradictions and paradoxes. For example, if marty and jennifer traveled to 2015 how could their future selfs exist? They would have been absent since they went to the future in 1985. They would be suspended from time until 2015. Sorry about the rambling .