This sort of thing happens less frequently in New York than it does in L.A., making it a little more surreal and confusing. You'll go for months without seeing anyone particularly famous and then one day Matt Damon will poke his head into your office and ask for help finding the office he's looking for, or Susan Sarandon will be chatting in your poling place, uptown where one wouldn't expect her to be. It's a little unsettling. Of course as New Yorkers we don't ask for autographs or say "I loved you in..." We just walk past, because, why WOULDN'T Susan Sarandon want to be hanging out in Morningside Heights?
She's incredibly gorgeous in person. That's predictable.
Also my dad's still registered to vote in NYC. He's been dead 12 years. Is there a Kennedy running?
P.S. If you want to go celebrity HUNTING in New York it's easy to find them. Go to super expensive restaurants, or, of course, Broadway haunts. It's the casual unexpected encounters that are jarring, not the "I saw Matthew Broderick exiting the theater" ones.