weird but cute head shaking

[felix11]

When Pony is very satisfied with herself (like after she has chased off the family dog, destroyed a favorite toy or found a really great, really high perch) she will do this weird little head shake a few times as she starts to strut around. It is a couple of quick wobbly flicks from side to side. My other green cheek Drake has never done this, and Pony only started doing it herself a few months ago. Does anyone else's bird do this?

[Michael]

Kili raises her head up and down like this when she's all proud of herself.

[liz]

Myrtle flipps her head from side to side when she "back talks" me.

[Polarn]

haha Polarn does the movement you discribe whenever he manage to get the swing going or if he manage to steal something from me or does anything else he think is fun, or is proud of...