Series 9 Episode 7 discussion

[conniesachs]

Can anyone help me out with a scene that's been bugging me?

When Vaughn returns to his house and the chinese henchman puts the gun to his neck he asks "Are you bluffing __________?" - What was the name he said? Thought it sounded more like Sam than John, but my hearing really isn't what it should be.

When the chinese boss asks who is bluffing Vaughn apologises and says he didn't realise it was him. So who did he think would put a gun to his neck, John? Some other party we don't know anything about yet?