When you think of a kangaroo, you probably imagine a cute, fluffy animal hopping across the Australian outback. Maybe it has a little roo in its pouch. Well, in that case, you'll be in for a surprise when you see a picture of this monster of a buck. At 6 feet 5 inches and weighing in at 100 kilograms (220 pounds), it's the kangaroo of your nightmares.

Jackson Vincent, a gardener from Fremantle in Western Australia, came across this beast when he was visiting his grandmother in Margaret River. He noticed it bathing in Boodjidup Creek while out walking his dog, Dharma. Now his Facebook photos of the giant kangaroo have gone viral.

The veiny chest looks pretty disturbing to us, but Vincent says he found the animal's claws even more terrifying.

“His claws were really big – they were as long as my hand," he told reporters. "That for me was even scarier than his muscles, they looked nasty.”

He tried to take a photo, but admits the size of the marsupial made him jump.

"I am pretty confident around animals but the moment when he started to come out of the water my heart definitely jumped and I decided to take a few steps back.”

According to Vincent, the animal was at least 2 meters (6.6 feet) tall and weighed around 100 kilograms (220 pounds), which is about two-thirds the weight of a sumo wrestler.

Vincent says his biggest concern was for his dog, who he didn't want lured into the water and drowned by the buck.

But after Dharma had been safely dropped off at his grandmother's, he returned to see if he could spot the kangaroo again. According to Vincent, the creature looked like it was puffing up his chest muscles in intimidation. 

"I definitely wouldn't like to take him on in a boxing match."

Kangaroos can be dangerous, but the risk of being attacked is very low. According to the New South Wales government website, no more than five people are treated for kangaroo-related injuries every year. But if you want to avoid being a roo's punching bag, they do advise keeping some distance.