Eames really had some choice words about whether or not he gets to be angry, (the answer is that he does when somebody makes him sound like a sociopath who gets off on embarrassing people, if anyone's curious,) but then Arthur makes the joke about the watch and it completely stops him dead in his tracks. He pauses, and then laughs a little incredulously because it's the only way for him to process the change in tone.

"Well, the opportunity was there," Eames says with a shrug, "you're the one who took it off the table."