Play switches from yellow team left back area to inside opposing half via a long ball. Keeper comes out to sweep, misses ball. Meanwhile a blue player goes down clutching his face/ stomach off the pitch. Club assistant shouts "ref". Attacking yellow player has since run through on goal with the ball and tapped into an empty net due to GK howling error. Play hasn't been stopped. Goal allowed. Correct decision? All events seemed to happen at the same time.