A couple of movie trivia questions...?

[checky]

Two movies, two lines:

What movies do these lines come from?

"I'm B-a-c-k!" (there might be more than one movie with this line - if there's more than one I'd like to know)

"I'm dying" (some guy in a truck(?) or was in a truck) "Keep on dying" (another guy) or something like that.

Thanks.
The first one is bugging me the most.

 

[Finn]

Im dying from reservoir dogs?

 

[kaijawitch]

I believe I'm back comes from poltergeist 2.. Kaine said it to carolanne