Sequence of still images Dan shot when dropping into the middle of a humpback whale heat run (6 bull whales chasing a female - grunting, squealing, jostling, fighting, for dominance, for the right to perhaps mate with the female) off the island of Vava’u, Kingdom of Tonga. August 22, 2014. Its hard to explain the rush of adrenaline to see, hear, FEEL, 200 tons of horny whale rushing at you top speed - going all around you, narrowly avoiding you. The runs can last for hours - we followed this one around for half the day, making drop after drop into the middle of it. A few times they decided to use us and our boat as an obstacle course - instead of charging on by us, they slowed and began circling our boat, repeatedly weaving through our little group of snorkelers. INTENSE.