Burger King is a rainbow of surprises these days.
The company recently unveiled a black Whopper for Halloween, a version of the chain's signature sandwich served on a dark bun. But people who eat the A.1. Halloween Whopper say it goes in one color... and comes out another.
The company told ABC News that the black bun contains less than 1 percent food dye, and writes in its nutrition facts that the flavorings and food colorings in the bun "are commonly used in the industry and within the safe and Acceptable Daily Intake (ADI) approved by the Food and Drug Administration (FDA)."
It does not specify which colors are used, but Medical Daily reports that green dyes are often used in black food coloring.
Whatever the reason, the emerald-hued number twos have unleashed the #GreenPoop hashtag:
Not everyone is put off by the goblin-green Halloween side effect. In fact, several customers seem to be looking forward to it:
One note of caution: Use care when scrolling through the #GreenPoop hashtag as some people are posting visual evidence.
Also on HuffPost: