Watch out Billy 
The brain police are coming Billy 
Watch out Billy 
The brain police are coming Billy 
Oh, Watch out! 

Watch out Billy 
The brain police are coming 
Watch out Billy 
They're coming beside you Billy 

Watch out Billy 
They're coming beside you Billy 

Oh... 
Coming down to get your mouth 
Watch out Billy 
The brain police are coming 

I said watch out Billy 
They're trying to hold you Billy 

I said watch out Billy 
They're trying to hold you Billy 

Get down 
Watch out, Billy....