KF Where is the Scrake's head-hitbox?!?!

Dat situation. When the Scrake is stunned for seconds.



I seem to fairly miss sometimes the Scrakes head when it's about sharpshooting with Sharpy or Commando. Could anyone enlight me his hitbox location? Preferably via a short Video or Screenshots. So many people say his hitbox is there, there and there. These locations are all different!



I must learn it the visual way, not the text way.