Press the watch the video link in the page you are about to open .. odd stuff, really odd.

wbz4.com/water/watercooler_story_239143035.html (http://wbz4.com/water/watercooler_story_239143035.html)

They are clearly practicing Feign Death, I can't wait to show my monkly brothers lolz.

Looks like the ones that fall are crippled.

yeah. the one in particular has something wrong. It just doesnt appear to be a healthy animal to begin with... although after all of those falls I'd be pretty stiff too.

I suspect they've been bred to retain a predisposition for either narcolepsy or epilepsy (probably the latter, given the stiff legs).

Heh...or a genetic defect where when the animal is scared and the blood pumps harder it creates some sort of blood flow problem to the brain.