Ouch

It needs to be asked Why?

And

Sure hope she is OK, whatever you think of her....

That sort of kenetic and much less, hit on the head, especially where she did so, can seriously and does every day either kill people, or leave them with serious life changing repurcussions....

50/50 between a concussion or something much much more serious, especially if the noise on the video of the collison was actual/real/ rather than fake...

She would be lucky to be alive a few weeks later or without some serious life long difficulties...

That's classic subdural/extradural heamatoma's there, that need parts of the skull removed, induced coma and fingers crossed sort of stuff, to stop death, vegetation, her own weight, the object hit, where, speed, noise etc...it's about 3 times the force (as moving at impact causing more issue shea0 and metal, solid,all force back to point of impact (especailly the direct opposite part of brain from impact site) as a really really good boxer punching as hard as he can with no gloves, right there twice in a row)

She may have been, lucky, many many in this and much less, just feinting or fitting hitting their heads like that, are NOT.

May God Bless You and Her and Hers and Yours.