Fortunately, [EHS] is not as dangerous as it sounds.  
 
But it is a real condition, and researchers are finally beginning to seriously investigate the rare and little-understood sleep disorder.
 
 
[the return of linkfilter.net makes *my* head explode]
...
clu: I can verify this is a thing. It's only happened a few times, usually while sleeping. Not fun.
beaglebot: I can too, it runs in my family so I at least knew what it was the first time it happened. It's still really weird.