You are on the scene of a person down. you arrive at a college dormitory and find a 21-year-old patient lying supine on the floor, unresponsive. the patient is "guppy" breathing at 5 times a minute, has a strong radial pulse at 110 beats per minute, and has vomited on himself. friends state they went out to dinner and a party. they returned to change clothes for another party and he never came out of his room. your partner suctions the patient, inserts an oropharyngeal airway, and ventilates the patient with a bag-valve mask with high-concentration oxygen. you listen to lung sounds and there are coarse rhonchi bilaterally. what condition do you suspect?