The time-space travel paradox in all the BTTF movies are so damn complicated that I can't even keep track of which present timeline Marty and Doc would end up in both BTTF II and BTTF III....
Vamp, I'd advise ya to go to http://www.bttf.com and pay the forums a visit since there's a lot of ppl discussing the flaws in the BTTF movies.
Despite the flaws, I do still love the BTTF triology 
and oh shit I now remember that 2005 is the 20th anniversary for the first BTTF! Im probably hearing rumors about the release of a 20th anniversary BTTF special on DVD but I 
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