She does watch him for awhile as he stands in line, just to see what he likes to do while he's waiting. Some people like her would always be checking their phones. But if he's not into technology, she's curious about what he'd do to pass the time. At some point though, he'll surely catch her looking at him, and when he does, she'll wave a little, slightly embarrassed, and turn back around.

When he comes back, she lifts her head as soon as he comes into view, and sets her phone face-down on the table, next to her own drink.

"Oooooh. Right. That." Haha hum. Felicity leans in towards him, like she's about to say something top secret. "Soooo, can I trust you?"