I dislocated my right knee, leg sticking out ninety degrees to the from where it was supposed to be, age sixteen in wrestling practice when the guy I was practicing against did a single leg take down at the wrong angle. Besides a sound that resembled a thick maple branch snapping (my ligaments and cartilage I presume) I don’t recall feeling much pain till later. The brain has a way of filtering out stuff it knows you can’t deal with immediately. But it was still a “You’ve got to be f***ing kidding me!” moment, so I do empathize with the young lady.
I get it for you. dislocating a knee is a big deal. This lady dislocated a knee cap. Completely different animal. Your situations do not compare.