girls fix their hair involuntarily most of the time, but some very clever ones also know we’ll prolly pick up on this very obvious signal. they might do the hair thing around you if they like you, but it will be totally intentional, she knows you’ll think she likes you when she does this. when done on purpose 1-3 is the max. no one goes crazy with their hands and combs it right infront of you on purpose. if she was combing her hair WAY too much as you say, then she could be crazy. but if we assume that she’s not actually nuts, and this is my conclusion, she was doing it for the guy infront of her because he cant see her like you can from the back and she wanted to make sure that each time he did look at her, he saw the signal.