Headcanon 9
One day during training, Jen loses control of her powers and she doesn't know how to stop it. Just in time, Aizawa stops this by using his quirk to temporarily stop them from getting out of control and hurting the other students, it works and she passes out from the energy that was used up from her powers.
An hour later, she wakes up in Recovery Girl's room and sees Izuku and Denki beside her because they were worried about her after what happened during training and wanted to know if she was okay, she asks what had happened and they tell her that her powers got out of control. She gets extremely worried that she had hurt someone but they tell her that everyone is fine.
Jen tells her two friends that she's disappointed and embarrassed that her little episode had happened with her powers when she really thought had completely under control. Izuku tells her there's nothing to be ashamed or embarrassed of and tells her how when he got his quirk, it took him a while to learn how to control them until he got the hang of it and learned how to do it. While it doesn't make Jen's feelings about what happened go away, she feels glad that there was someone that understands what she is going through with her powers.
