CANADIAN John Graf was unconscious for five minutes and had a fit attack as injuries spoiled any hopes the team had of a place in the Cup competition.
Graf, one of three Canadian players put out of action, was taken off on a stretcher, and given a precautionary neck-brace, after taking a knock on his head while attempting a tackle on Papua New Guinea's Willie Arthur in Canada's 28-10 Pool B victory.
In their second game, the injury-weakened Canadians were swept aside 40-0 by the impressive Welsh President's Seven side, the Welsh sewing up the pool having earlier beaten Papua New Guinea 35-12.
Arthur, seconds after Graf's tackle, realised his opponent was in trouble and immediately gestured for help.
A medic was on the scene straight away but Graf lay motionless for several minutes before being carried off and taken to the Adventist Hospital.
Tournament doctor Mike Fleming said: ''He had a fit after the tackle and was unconscious for five minutes.