That was real, very hard for someone to go down that hard knowing their head was going to hit without a tell. Meaning they will try and protect their head even just a little bit before it smacks, and she didnt. Also look back a bit in the video from when she fell and you can see her do a strange move with her hips to catch herself and regain her balance, she had a wobble moment there which should have warned her. Gotta give her credit for forging ahead till the bitter end