Jeremy Brock was working an overnight shift stocking shelves at a grocery store when he felt excruciating pain in his chest.
"I haven't felt anything that painful in my life," he says. "It was really hard to breathe. I couldn't breathe."
His lung had just collapsed.
Brock was taken to the hospital and given medication to ease the pain from the puncture in his lung. He says nurses didn’t tell him the cause of the incident but he thought it was likely due to his heavy smoking.