From engaging in a battle of theatrical dives with Chelsea star Didier Drogba, to stamping Mainz strikers, getting shirty with whoever trod on his toes and his long-standing rivalry with Oliver Kahn - Jens Lehmann's craziness has long been documented.
But not even the Arsenal custodian would have attempted the above, would he?
For Lehmann's eccentricities, for all of the game-changing saves he could produce one minute, then get himself booked the next, at the heart of it… the former Arsenal shot-stopper was a lovable rogue.
But Branitelj goalkeeper Romeo Mitrovic, who competes in the Bosnian second division, may be nothing short of psychotic.
In the video above, the 35-year-old can be seen getting booked by the referee, only to flip his lid severely and attempt to clobber the officiator around the noggin'.
Fortunately, the referee ducked away from the blow… at worst receiving a glancing right cross, before scarpering away to assess the situation.
Branitelj lost the game against Budocnost 1-0.