He allowed a restart with a player prone on the ground. It turned out he couldn't continue so it was serious enough not to allow the game go on around a player prone on the ground. Once the ball goes out of play get the injured player off the field and then restart the game. Add the time on at the end.That’s not the answer to my question tbh.
What serious injury? Is it serious? How serious?
A player being helped off a field rather than holding up the play is exactly what the rule calls for