I haven't had a chance to read through the whole thread, so someone probably has talked about this point. The biggest problem of the third movie is they are usually running out of ideas and make too many nods to the original movie and it comes off as cheesy. People like me always roll my eyes, "Been there done that!"

Back to the Future III is a perfect example of this. Now BTTFIII is an OK sequel, but they have the typical 'Marty wakes up next the Lea Thompson character and doesn't know what year it is...." or "Marty had to evade Biff or Griff cause he insults him and Biff/Griff usually ends up in horseshit.

I think the reason of this is the writer feels you know the characters at this point, so they know its an easy laugh to bring up something from the original movie just in a different setting in the 3rd movie.