Questions About A Film You Always Wondered About But Never Bothered To Ask

Ever since I saw Men in Black for the first time, I always wondered why Agent K neuralizes James just after visiting Jeeb's place for the first time, only to invite him to become a MIB right after?

Surely the train in Batman Begins had an emergency stop button? Why did not Batman just press that instead of making Gordon blow up the railway?

Somebody needs to watch Enemy (new movie) and explain that ending to me.
The symbolic meaning of the spider as well, and the obvious "this movie has more behind it than what you've just watched"?

El Gunner wrote:Somebody needs to watch Enemy (new movie) and explain that ending to me.
The symbolic meaning of the spider as well, and the obvious "this movie has more behind it than what you've just watched"?

This is a way more detailed version of what i thought it meant.

Was talking to my mate who loves finding plot holes. Specially in time travel movie.

So this based on 'The Butterfly Effect'

When Ashton goes to prison and has to prove to the cellmate that he can do miracles. Ashton goes back in time to stab his hands and prove to the other guy that he can do things like that.

Problems with that

1) If he stabs his hands at the age of 10. He shouldn't have the stab marks freshly appear on his present self after 20 years.... It should be healing over time.

2) If he stabbed his hands at the age of 10. Then he should be in prison with the stab marks Already present

Can't believe I never thought of that.

Spoilers obviously

Saw 'The Silence of the Lambs' recently. At the end of the movie Hannibel calls Clarice and asks her "Are the lambs still screaming?" I don't quite understand what he meant by that. They delved into Clarice's past and explained how she tried to save a lamb but ultimately couldn't. I can't wrap my head around what he said, is it an allegory in the sense that she can't save all the lambs (people), so will one make a difference?