Fus ro dah!!

Could also be a hadouken.

Could be the force

Maybe the blast want strong enough to fully push the human away. Hair is lighter than she is, therefore the hair would move away still at a faster rate than she would. At the tail end of the blast, a person will start to slow down. Centrifugal force takes effect.

Yes, I'm sure that was exactly their thoughts when making this picture

Never said it was. Was just proving a point.