Before you just start laughing at these kitties who appear to suddenly fall out at random, I'd like to bring your attention to the disorder that causes this. Myotonia congenita is a non-inflammatory hereditary muscle disease also known as fainting goat syndrome as it most often affects those creatures. While the illness is also found in dog breeds, like the Miniature Schnauzer, here are two sweet kittens who were born this way, too.
Easy to spot as it looks like the animals go from moving to fainting in an instant, it's actually a temporary paralysis that occurs when the animals are startled and while running or jumping. Sadly, according to the poster of this video, Spike (the black and white kitten) passed away on Oct. 27 of respiratory failure. RIP, lil one.