I questioned that one too. I only watched the beam back, but it was projected onto the wall in the lounge, so it wasn't a small screen we were peering at.
Dropping like ninepins in the penalty area whilst we're waiting to take kicks in extra time is also unsporting. Granted, the first one went straight down the tunnel after being substituted, but I reckon the second 'head injury' was entirely fake. Just time wasting. If the second one had a head...