An anonymous donor is giving $100 bills to strangers who follow his social media clues to locations around Philly.
The first step in winning the cash is to follow @FindMePhilly on Twitter and then wait for a tweeted photo or Vine showing the generous donor's location.
Once a new location is revealed, the clock starts ticking.
$100 if you can find me. You have 13 minutes. Timer starts when I post the first picture from a new location.