What's happening here

lol at Sakura

both were going to ask Kakashi where Naruto was, but Hinata beat Sakura to it

When I saw this for the first time, i had to look at it over and over and i still didn't understand why she did that.

She didnt even touch sakura to give her a reason to spine like that

lol sakura got owned

She was surprised that even though she was ahead of Hinata she still got past her. She just spun to be silly. Proven by the fact she stops and points like a sort of pose. She was pointing at either the kid or Kakashi ans said something but yeah, she was just being silly for the moment.