Five enormous dinosaurs
Letting out a roar.
One went away, and
Then there were four.

Four enormous dinosaurs
Crashing down a tree.
One went away, and 
Then there were three.

Three enormous dinosaurs
Eating tiger stew.
One went away, and 
Then there were two.

Two enormous dinosaurs
Trying to run.
One ran away, and
Then there was one.

One enormous dinosaur, 
Afraid to be a hero.
He went away, and
Then there was zero.