When a New Jersey black bear was "desperate", it quickly climbed up a tree. Believe it or not, what forced it to do so is actually a home cat weighing less than 7 kilograms. This bicolour (brown and white) home cat is named Jack. It has always been working hard to safeguard the "territorial sovereignty" of its master. It would never allow any small animals to step on its territory even for a second. However, its master and neighbors did not expect that it would also be fearless in face of a strong enemy like the black bear.