Nate, a Spy from a very secret Agency has been given the task to spy on you for some reason. He thinks you're a total normal citizen of your home city and thinks this will be way too easy. What he doesn't know is that you're an Agent as well, not under the same Agency but you've got some experience as well

This time you're out grocery Shopping and hes there too. At some point you decide to test his skills and walk up to him, acting as if he is a stranger to you

Excuse me sir...