The causes are usually hunching or benching more weights than what you can lift.
After you have popped your chest, it takes about 6 or more hours until you can perform it again.
Joe: Dude, I've been trying to pop my chest for hours, I still cant do it.
Brendon: Have you tried holding your breath while you're doing it?
McGuirk: Dude! Did you hear that? That was one of the loudest chest-pop I've made. It hurts and feels awesome at the same time.
Melissa: You're weird.