ONE of the unforgettable experiences to be had in California is to go whale watching in Monterey Bay. Nancy Black, a licensed marine biologist, is one of the scientists who lead these commercial outings, besides doing her own whale research. As Lawrence Biegel, her lawyer, tells it, one day Ms Black was in her research boat with assistants when killer whales attacked a pod of grey whales and killed a calf. Its blubber floated to the surface, and the killer whales were about to feed on it. Seizing this opportunity to film their behaviour, Ms Black threaded ropes through some pieces of blubber, then lowered a camera underwater.