Seventeen's reaction to you turning around quickly causing you to smack/whip them with your hair.
S.coups, Jun, Hoshi, Mingyu: would tell you that you hit them with your hair and expect an apology, except… they’re really greasy about it and want you to do something like giving them a kiss to earn their forgiveness
Jeonghan, Joshua: wouldn’t comment on it at all because they don’t think it’s a big deal, and they know that you didn’t mean to do it
Wonwoo, Woozi, Vernon: honestly… wouldn’t comment on it because your hair smells nice… they didn’t mind getting smacked with it tbh
DK, Minghao, Seungkwan, Dino: they would also tell you, but just to let you know. they would be neutral about it, and just want a regular apology. DK and Seungkwan may or may not overreact on how much it hurt