When they say "This is what happens when you let your kitty watch too much RU-vid", it actually means that that cat either has something stuck to its butt or private area, or that it has an infection of some kind. Sure it looks funny, but it really isn't. The cat probably needs some kind of meds, and the sheets need to be washed.
They have anal glands, and sometimes need help emptying them also. That booty scooting boogie that the cat did indicates a large amount of either itch or pain, with abscess being worst case scenario.
Crazy Goofy Independent Fearless Vicious Manipulative Apex Predators Disguised as Cute Little Innocent Furballs That Do Whatever They Want Whenever They Want and Will Stand Their Ground Against a DINOSAUR to Protect Their Territory and Family....Backing Down is a Last Resort...I Love & Respect & Admire Them Very Much