Romero's head

This thing (also known as the Boss Brain) looks like John Romero's head on a stick. You have to shoot it with the rocket launcher in Doom II MAP30: Icon of Sin or you can be a big fat cheater and noclip yourself and shoot (or punch or saw) the head.

The head has about the same health as a cacodemon, but each rocket will only do a little damage, so it takes 3+ rockets to kill the head. When the head dies, there are explosions and the level ends.

The head alone is harmless, but usually with these heads come spawn shooters.