In March 2013, I was freedive training off the coast of East Africa. The water was crystal clear. I was ready to ascend from a 100 ft dive when I saw a bull shark swimming towards me from about 100 ft away. I had no speargun or camera with me. The shark was behaving strangely; very alert and curious. It was more interested in me than any other shark I've seen. Without much concern, I started my ascent expecting the usual last-minute turn-around-and-gone move sharks alwa