Joni: "Hey Mom! When you lift your knee, your bum goes-a-dancin'. I 'learned-ed' it when I was sleepin'. See watch!"
*she then intensely squeezes her bum cheeks together better than Nacho Libre in the white stretchy pants scene*
Joni: "Pretty cool, huh?"
I'm not real sure what her knee has to do with any of it, but I pretended to be impressed. :)