BELMAWR, N.J. - A casual father-son fishing trip quickly turned into a whale of a good time at the Jersey shore!The duo were standing on a boat with fishing lines cast, when suddenly hundreds of fish started jumping from the water.Moments later, the surface of the water broke, and a huge humpback whale breached, then knocked against their boat off the coast of Belmawr.MORE HEADLINES:The shocking moment, and equally surprised reactions, were captured on video posted by Zach Piller from Bensalem."Oh (expletive)!