The wiggle of death 😂 

They wiggle to adjust their feet without lifting them. Their usual prey is extremely sensitive to vibrations through the ground and so when they're hunting, they get within pouncing distance and then they have to adjust their footing for the optimal pounce. Hence, wiggle butt.

The wiggle lol 😆

me with 13 cats ... everything that moves under the blanket

First youtube short to make me smile in a while

That “wiggle of death” is actually the cat signaling it’s going to strike.