An unknown couple started a chain reaction at Aramingo Diner in Port Richmond, PA by paying for their own meal and for the tab including tip, of another table of diners at the restaurant. For the next five hours, dozens of patrons got into that same holiday spirit paying the favor forward — generously picking up the tab for strangers, in gratitude for the meal that had been paid for them.

READ the story from NBC Philadelphia, or watch the video below…