Rincewind
Philosopher
There was a story on the BFF about someone collapsing in a heap when Bigfoot approached. It was clearly a case of Cataplexy probably due to Narcolepsy.
Often Cataplexy is brought on by extreme fright or extreme laughter. The person is fully conscious (as was the case in the BFF story), but unable to move their involuntary muscles. Their breathing and heart beat continue. They are able to see what is going on around them. Many of the footers that this has happened to, will not agree with this as a diagnosis, because they don't want to be labeled as a Narcoleptic. Therefore Bigfoot has infrasound and zapped them, causing them to collapse.
"Cataplexy" - obviously cats do this as well....