Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

In Let the Right One In (orig.: Låt den rätte komma in), after Oskar found out about Eli's true nature and let her into his apartment he asks her:   Oskar: Who are you?    Eli: I'm like you.    Oskar: What do you mean?    Eli: "What are you staring at? Well? Are you looking at me? So scream! Squeal!", those were the first I heard you say.    Oskar: I don't kill people.    Eli: But you'd like to, if you could...to get revenge. Right?    Oskar: Yes.    Eli: I do it because I have to. Be me, for a little while. Please... be me, for a little while.   But I don't understand what she means with her last words. What does she want to say with "Be me, for a little while"?
What does Eli mean with the words "Be me, for a little while"?

In Lucy there was a car chase. Lucy was driving and there was a police officer in the car. Lucy was driving extremely fast when officer said:    Better be late than dead   In reply Lucy said:    We never really die   What did she mean? At the end of the movie we saw Lucy tell the officer that "I am everywhere." I'm guessing she became immortal, but normal people are mortal. What did the writer actually mean? Even Lucy didn't know at that time what's gonna happen when her brain usability reaches 100%.
What did Lucy mean by "We never really die"?

In Iron Man 2 (2010), Whiplash (the villain) enters as a track marshal during a race on the Grand Monaco Racing Track, unleashing his weapons on Tony Stark when he's most vulnerable.    But, Tony only decided to race the Stark car minutes before the race, which Whiplash couldn't have known.  Was he able to predict that it was going to happen or is he that lucky? Then, how could Whiplash come so prepared without knowing that?

How did Whiplash know that Tony Stark is going to the racing track?

