A kangaroo stands with its tail in an American zoo with extremely well-developed muscles.

A kangaroo named Jack was recently photographed standing up with his tail in a zoo in Texas, USA.

In the video, it holds a green box, keeps jumping up, and even stands with the power of its tail alone.

Kangaroos are famous for their strong tail, excellent balance and developed muscles.

Netizens said that kangaroos are creepy, just like giant rabbits that mutated after using steroids.