Math not mathing

How does some podunk McDonald’s employee, doing ten other tasks while also helping customers, have the ability to recognize this person eating in the corner of the restaurant as “the guy”?

Honest question. I’m very much confused and my spidey senses are going wayyyy off here.

How does some podunk McDonald’s employee, doing ten other tasks while also helping customers, have the ability to recognize this person eating in the corner of the restaurant as “the guy”?

Honest question. I’m very much confused and my spidey senses are going wayyyy off here.