Time Travel Consultant

I just rewatched Back to the Future. In the end credits, I noticed someone who was credited as the "DeLorean time travel consultant." That is awesome. How do you become a time travel consultant? 

For some reason, this time I got a real kick when Doc reads his own letter (written by his future self) and starts tearing up. I never really paid much attention to that scene before. 

I also noticed an awesome parallel. Marty and Doc's friendship is a lot like that of Ben and Fern's friendship with Dr. Octavius. Teenagers that are friends with quirky inventors (or mad scientists).  No wonder that fanfic is so fun to write. Back to the Future was right. 

Marty ended up as Doc's friend because he was told not to go near that crazy scientist. I figured that was the case, and it turns out that's what the filmmakers intended as well. Though I feel like Marty and Doc's relationship best comes out in the third movie. Maybe because that's when "present Doc" gets the most screen time. In the first movie, it was mostly "past Doc," who didn't know Marty yet. And in the second movie, Doc was mostly backup. It was the third movie where Doc really got his own story. 

The ending makes no sense. One of the main points of the trilogy is that time travel is too dangerous, and the time machine has to to be destroyed. It's ridiculous for Doc to rebuild it just to get his dog, especially when he'd already asked Marty to take care of Einstein. He wanted Marty to know that he was ok, but he could have left another message like he did before. 

But still, it's damn cool to see the time machine train fly off. Which is probably the reason they ended that way.