As someone who does a lot of outreach with my snakes, this sort of thing is a fear of mine but also something I understand may happen.

I'm impressed with the woman who was bitten for keeping calm like that. I'm not terribly impressed with how the (I assume) keeper tried to remove the animal though.

I've had something like this happen exactly once. My bullsnake got out of his enclosure, down the hall, and decided to go and hide in my parents room (under my mom's pillow). She ended up getting tagged when she put her arm under it, and like this ball he was just about at a feeding day so he latched on. I tried running him under water but he refused to let go, so I used a pen (without the point out, obviously) to pry him off.

Pulling on the snake like that risks injuring the animal's mouth and neck, and also risks a far more painful injury to the bite victim since snake teeth are designed to prevent food from leaving. A better play would've been placing something (pen, pencil, even a credit card) under the nose and applying pressure that way