The plank-ee is believed to be a woman by the name of Margi.
She didn't think her stunt was cruel.
The 4.65m, 600kg saltie was powerless to stop the plank prank at a crocodile farm.
It was taken to the farm after being caught in a permanent trap in the Katherine River last month.
The bull was so big that rangers had to use a four-wheel-drive to drag it out of the water.
It is the biggest croc caught in the Territory this year.
Ranger and crocodile catcher Tommy Nicholls said the saltie would become a "show croc", rather than a stud, because it was too big to breed.
"An animal that big usually ends up killing the females," he said.