The Marrog

 My desk's at the back of the class and nobody knows

I'm a Marrog from Mars with a body of brass

And seventeen fingers and toes.

Wouldn't they shriek if they knew I've three eyes at the back of my head

And my hair is bright purple

My nose is deep blue and my teeth are half yellow, half red?

My five arms are silver with knives on them shaper than spears.

I could go back right now if I liked - and return in a million light years.

I could gobble them all for I'm seven feet tall 

And I'm breathing green flames from my ears.

Wouldn't they yell if they knew 

If they guessed that a Marrog was here?

Ha-ha they haven't a clue -

Or wouldn't they tremble with fear.

Look, look a Marrog 

They'd all screen and shout.

The blackboard would fall and the ceiling would crack

And the teacher would faint I suppose. 

But I grin to myself sitting right at the back and nobody nobody knows.