The Headcrusher

Chin is positioned to the lower bar 
Whereupon the cap is made to put on 
Down by means of the screw 
The headcrusher is used on you 
The caps are furnished with soft material pads 
In order to leave no mark on your head 
Teeth are crushed into their sockets 
And the surrounding bone is smashed 
Until the brain is forced out 
Through the fragmented skull 
Just a few turns of the screw 
Are sufficient to make you do what I want you to do