Did you ever get so engrossed in a book that you couldn’t put it down?
This is Carly’s exact situation in the video. Carly is so absorbed in her book that she doesn’t even want to leave it. She doesn’t care about the book. Her bladder needs to empty and she isn’t going to stop.
She starts to leak her pants as she reads. The leaks soon become a torrent. She can’t stop the flow of her urine, which is causing it to pour down her legs.