Couple of plot holes
In BTTF pt 3 I noticed these 2 plot holes.
1. As Mcfly, still in 1955, is speeding towards Wild West of 1885 in his delorean, his car shows all the sparks and sizzles that time travel brings but his car dash still shows 70mph. It shouldn’t do any of that till it hits 88mph
2. When he ends up in 1885 and tumbles down the hill into the fence and faints and is woken by Mrs Mcfly, he looks at her and says “you’re my…you’re my…” as in prior movies implying she’s her mother since she obviously looks like her. And then says “who are you”. However this can’t be possible since his mother married George Mcfly and Marty’s great grandfather here has no relationship to Lorraine’s family at all. So it shouldn’t be possible for his great grandma on father’s side to look like Lorraine at all. (No weird shenanigans here)
So these were not correct.
There’s probably lot more but just caught this