In The Departed (2006), Frank completes his phone call with Sullivan about the existence of an undercover cop in his crew while standing under a bridge. As he walks away, Captain Queenan and Dignam suddenly greet him from the side of the structure:
Queenan: What did you do with the real microprocessors, Frank?
Frank: Microprocessors. Oh, yeah. I heard the story. You arrested some Chinese government guys... at the border carrying some light sockets (Captain Queenan and Dignam laughs) or something.
Why did they laugh in this scene ?