Burger King's Black Whopper is turning people's poop green and everyone is vastly confused

Turns out, there may be an unintentional trick to Burger King's new Halloween treat. The Halloween Whopper, a limited-edition burger available throughout the month of October, comes with a black bun to make it extra spooky.

http://mashable.com/2015/10/05/black-whopper-green-poop/