Set Kitteh Phasers to "Stun"!

Video remix of cute "Fainting Goat" Kittens. They suffer from a genetic disorder that causes them to stiffen up and fall over when startled. It's rare in cats; the name comes from a breed of goat where the condition is more prevalent. (via Cynical-C)

UPDATE - Sad news to add to this story: apparently, one of the kittens, Spike, has died because the condition interfered with his respiratory system. Fortunately, there may be hope for Charlie, the other cat. This BBC followup has more details.