If you know the term 'Happy Feet', then you, like me, are a parent that joyfully embarrassed themselves in front of their kids with random dancing, all the while yelling 'happy feet!'.
Happy Feet, comes about when good things happen and you just have to express your feelings of gratefulness and spontaneous happiness. To be honest, I've also incorporated 'happy feet' when I didn't feel so good, because random acts of ridiculousness can create true feelings of happiness.
Enjoy the video. May it spark in you a moment of your own 'happy feet'.