From the LiveLeak video description

A group of fishermen caught more than they were expecting during a recent jaunt off the coast of Canada. As their lures bobbed in the choppy water in search of salmon and halibut by Vancouver Island near Tofino, British Columbia, a humpback whale slowly approached their boat. Then, when it was only a few feet away, the powerful mammal leapt into the air before belly-flopping back into the water.