Oh no :( I can imagine how upsetting and demoralising this was – not surprising you’re feeling that bit less optimistic about fellow humans.
Maybe she was in a state of shock too, or maybe she panicked. Doesn’t make it right but she sounds like a kind human who made a mistake and who’s most likely feeling really bad right now.
Either way, really sorry to hear this and glad you came away in one piece, albeit injured – hope you get showered in hugs, smiles and treats and feel better soon. X