When she falls down, she is still struggling with the hugger so its likely she was rolling around for a few seconds before being knocked out while she was on her back.
The interesting thing here however is that she is standing a few steps before the grate that is in the middle of room (so its in front of her), but when she gets hugged and knocked back (away from the grate), the next shot shows that she somehow landed on the grate. A goof lol