A bit-o-commentary about the first post

Rating: Null/10 (7 December 2006)

If you watch the movie carefully, you see "Old Biff" dying as Marty prepares to return to the new 1985. This was, according to the DVD, due to a change in 2015 brought on by Biff giving himself the Sports Almanac, which, as we can see on the cover, records events that occurred between 1950 and 2000. Presumably, Biff is stupid enough to blow a fortune that would make Bill Gates envious and be abandoned by his sycophants in only 15 years. Also, don't forget that the change is occurring as Marty drives away, but not complete, much like when Marty weakened at the Enchantment Under the Sea dance in the first movie, because George and Lorraine hadn't kissed and fallen in love on schedule.