Is it really not safe to buy a bag of popcorn at the video store with intentions to enjoy a movie night with the family? Popcorn is supposed to be crunchy, buttery, innocent and friendly- not deadly. Turns out that the buttery coating on the popcorn contains a chemical called diacetyl and the bags contain a coating that breaks down into a carcinogen called PFOA. One Colorado resident has been awarded damages for contracting a chronic condition from microwave popcorn. Microwave popcorn is officially bad for you!