Here is a quote from The Avengers, 2012 film.
Coulson : But first, we need you to talk to the big guy.
Natasha : Coulson, you know that Stark trusts me about as far as he can throw me.
Coulson : I've got Stark. You get the big guy.
I know what "Stark trusts me as far as he can throw me" means: he doesn't trust me. But I'm not sure why the sentence includes about. What does about mean here?
Plus, What does I've got Stark mean in the exchange? Maybe Coulson meant I will take on Stark?