I'm at a punk show trying to avoid my mom.
What is the issue with your mom that makes you want to avoid her?
She mocked me about not doing my hair and according to her I'm such a poser.
Sometimes parents can be overbearing so It's okay to want time away from your family. Let them know where you are though so they don't get upset later on. Otherwise they may end up punishing you.
She can't punish me.
Did you and your mom go to the show together? You might want to avoid that in the future if you don't have fun being around her.