So here's the thing.
I'm a big fan of the Back To The Future films (BTTF was one of my most-watched films growing up). I always found it disappointing when Claudia Wells never came back to do the sequels, so the role of Marty's girlfriend Jennifer was filled by Elizabeth Shue. She does okay in the role, but she's not that great.
I've always thought they did a pretty good job in reshooting BTTF's final scene for the opening scene of BTTF2 with the new Jennifer. Which is why I thought it was pretty cool when I came across this rather great video on YouTube, presenting the final scene from BTTF and the opening BTTF2 scene simultaneously. And it's pretty interesting just to notice how much the pacing of the scene (subtly) changes between one version and the other - one film lags behind the other, then suddenly overtakes the other, and so on. It's also surprising to note that Michael J Fox actually introduces an extra use of the word "man" in the sequel.
Anyway, I just love that someone's done this - largely because it's the type of thing I wish I had thought of doing. Enjoy.