Ah, the spirit of Christmas. It inspires people worldwide to be more generous, more forgiving, and more accepting during the holiday season. Everyone except one rude customer who prompted Sarah Bélanger Demaneuf to enact a revenge plan that has the Internet howling this week.
Seventeen years ago, Sarah was working at a retail store when she encountered a particularly difficult customer. She detailed the experience in a Facebook post that went viral. I'll let Sarah take it from here: