They thought I might have had it when I was in the Marines, as a part of my "testing" i went through after I was having severe reactions to my Anthrax shots.

I was diagnosed with VCD, Vocal Chord Dysfunction. Check it out. Its pretty serious, but not as bad as having an asthma attack. Once you stop breathing and pass out from VCD, your vocal chords open back up letting the air flow, so you just pass out, not die.

Turns out its not that good to have in the Infantry.