https://www.youtube.com/watch?v=kPXcpXxG6Y0
George North is an absolute ox, but even he was knocked out cold by this collision with his own Richard Hibbard.
North got cleaned out by the crown of Hibbard's head right onto the chin, sending him crashing to the ground with both hands by his sides, where he lay motionless for a couple of moments.
Incredibly, North got back up and carried on playing the final 15 or so minutes of the Welsh defeat, looking incredibly groggy and clearly dazed.
North had also spent time on the sideline earlier in the game for another head knock, which can be seen at the start of the video, although he returned to the field after undergoing the concussion protocols.
It puts increasing pressure on rugby to install an independent medic who can make the final call players who suffer head injuries, after another night of concussion debate.
