It certainly looks like pop-corn but I will have to investigate further. It may just be a very clever 3D photo or polystyrene beads made up to look like pop-corn but, either way, it's an eye-catching advert.
Read about the event here: and see some of the movies here: (BUT I warn you, some of them are dire)
"You wanna know what's wrong with religion?
Religion is supposed to be about people being nice to each other, but frankly I don't see a lot of that. You know what I do see is, I see, a lot of people using the good book to say that they're morally superior. I see people building TV stations to bilk grandma out of her pension checks, all in the name of God. How about all those God-fearing people who are killing other God-fearing people because they don't fear God the same way?"
- Dr. John Becker