READ THE SIGNS

 
"Bang head here" that's what the poster said
So that's what I did I banged my head 
" Keep off the grass" that's what the sign implied  
So I did just that and went on the outside 

" Quiet please " all the notices were on the wall 
 So I did that and said nothing at all  
" Break glass in the event of fire" that's a good idea 
I duly did that and the fire brigade started to appear 

" Mind the step" by the stairs I was instructed to do 
I think all these signs are self explanatory don't you