what was the interrogation line in batman arkham knight in the line he said and both hurt
The line you’re probably thinking of is: “There’s two ways we can do this. Both gonna hurt.”
Context
It’s Batman’s interrogation line from Arkham Knight when he’s threatening an informant into talking.
Why it sounds familiar
People often misremember it as “both hurt” or “both are gonna hurt,” but the commonly cited wording is “both gonna hurt.”
Quick note
There are multiple interrogation scenes across the Arkham games, but this is the Arkham Knight quote that matches your description.