Famdoc/Chaos... I had a young man in my Chem I class (around 17yr)tall, thin, with small chest/rib development suffer from spontaneous lung collapse in class.... he had very ashen complexion, difficult breathing... luckily we had EMT within 5 minutes, and a RN on staff that supported him with oxygen...I had been in a motorcycle accident several years previous, was checked out at the ER and released, and suffered one the next afternoon...