[as he sets the tray down and starts to lower himself into his seat opposite her, he notices her tone and her look, and he looks at her a bit puzzled. but before he could ask, she had asked a question.]

Ah...you saw that? [since he's assuming it must have been the guy who caused her dour mood, he's going to be oblivious that he could have been the reason.] Crazy, right? I kept trying to get away from them, but they were persistent. Well, then again I can't blame them too badly. I am a pretty good catch.

[he's attempting to lighten the mood by joking a little with his ego as he thinks she'd just laugh and counter with something opposite. divert the attention away from her little "pick up" problem with his own. if only that assumption were true.....]