Do Geek Bars Give You Popcorn Lung Popcorn lung: What is it, and who is at risk? Harvard Health E Cigarettes: Marketed towards teens Bear Facts News GEEKBAR PULSE Makes a Grand Entrance GEEK BAR It's official. Flavored e cigarettes cause permanent lung damage. And doctors are already seeing it happen. In the United States, a teenager developed something called popcorn lung after secretly vaping for three years.