Referee sent Juventus security Aquilani to a knockout (VIDEO) © EuroFootball.com

While playing football, a dangerous opponent can become not only a footballer from the opposing team, but also... the referee. This was proven by Turin's goalkeeper Alberto Aquilani, whom the referee accidentally sent a knockdown.

A rare incident happened during the Sunday match against "Sampdoria" when the referee accidentally hit the goalkeeper who was running after him.

Fortunately, no serious injuries occurred - Aquilani continued the game.

Interestingly, in another match that day between "Bologna" and "Lazio," forward Mauro Zarate [link="http://eurofootball.com/index.php?page=news&id=22530"]hit[/link] the assistant referee.

Aquilani finds himself "knocked down."