Replacements is an ad for Fruit By The Foot snacks made by General Mills. It aired in 2009.
Synopsis[]
The commercial features two boys in a whitewashed room taking turns turning one into Fruit By The Foot. First the kid on the right says he replaced the other kid's shoelaces with Fruit By The Foot, which sure enough they are. Then the other kid says he replaced the other's fingers with FBTF. He replaces the other boy's bones with FBTF, and so he replaces his guitar strings with the fruit strings. Finally, he replaces the other kid's DNA with the snack, and sure enough, his skin is gone.
The final scene has the FBTF kid shaking hands with the other one over the box.
Why It's Cursed[]
The kids turning each of their things into Fruit By The Foot is sort of creepy, and could maybe give a kid a nightmare, especially the dead kid at the end.