Melbourne midfielder Bernie Vince accidentally took out umpire Craig Fleer at a centre bounce in their game against Adelaide at Adelaide Oval.
Fleer had just taken the bounce early in the second quarter when Vince ran into him from behind while trying to get to the Rory Sloane and the footy.
The two clashed heads, and Fleer had to go and get a concussion test done.
Watch it here:
He was replaced by an emergency umpire.
Melbourne are trailing the Crows 4.2 (26) to 6.6 (42) at the 20 minute mark of the second quarter.