It was a scary turn of events for those watching the Uruguay-England World Cup match last week.

Uruguay’s Alvaro Pereira took a knee to the head leaving him unconscious on the pitch. Pereira’s teammates signaled for trainers to hurry on to the field. He lay motionless for a few minutes.

With the help of trainers, Pereira stumbled to the sideline. The team doctor signaled to the referee to make a substitution.