When Burger King announced that it would be bringing its A.1. Halloween Whopper to the United States, a lot of customers were intrigued to see what all the fuss was about. Those brave enough to try the black bun Whopper learned that if something looks like it shouldn’t be put in your body, then don’t. That’s right, in a not-so-surprising turn of events it seems the Halloween Whopper from Burger King is turning customers’ poop green.

Burger King customers worried about the green surprise circling in their toilet, so they turned to the Internet for answers after alerting Burger King via Twitter. Although Burger King has ignored media inquiries regarding the effect Burger King’s Halloween Whopper has on its customers, a quick Google search shows that green dye is often used to make black food coloring. Other customers are blaming the A.1. Sauce baked into the bun. Either way, I know I’ll be steering clear of this culinary nightmare.