I have two words to say on the plausibility of this: Michael Schumacher.I am told that in the "Emmerdale" TV series, a woman in her 30's was stuck on the side of her head with a hammer that had been wielded with great force by someone turning to face her and that she seemed totally prone. Later scenes showed a wide blood smear where she had been dragged along the floor before being locked in the boot of a car. When the boot was subsequently opened, the woman then was not only able to strike her attacker, run away at speed in a straight line and later to speak in a normal tone with the normal speech pattern unimpaired.
Is it possible for such an attack as described to have no seemingly side effects to the brain that would allow a woman to run as described and then to engage in normal conversation ? I know that there are forum members with certain medical knowledge and I suppose that the script writers would surely have consulted medical consultants to the programme to check on such matters.
She might not be so fine a little further (anywhere from 2-30 hours later) down the track though. Indeed, one thing that medics do whenever there is a suspected head injury is not let the person go to sleep until they've been properly diagnosed or cleared purely because an awake person is far easier to observe.