I was aware that my legs were surrounded by water, but my top half was almost dry. I seemed to be trapped in something slimy. There was a terrible, sulphurous smell, like rotten eggs, and a tremendous pressure against my chest. My arms were trapped but I managed to free one hand and felt around -- my palm passed through the wiry bristles of the hippo's snout. It was only then that I realised I was underwater, trapped up to my waist in his mouth.

I wriggled as hard as I could, and in the few seconds for which he opened his jaws, I managed to escape. I swam towards Evans, but the hippo struck again, dragging me back under the surface. I'd never heard of a hippo attacking repeatedly like this, but he clearly wanted me dead.

Hippos' mouths have huge tusks, slicing incisors and a bunch of smaller chewing teeth. It felt as if the bull was making full use of the whole lot as he mauled me -- a doctor later counted almost 40 puncture wounds and bite marks on my body. The bull simply went berserk, throwing me into the air and catching me again, shaking me like a dog with a doll.

Then down we went again, right to the bottom, and everything went still. I remember looking up through 10 feet of water at the green and yellow light playing on the surface, and wondering which of us could hold his breath the longest. Blood rose from my body in clouds, and a sense of resignation overwhelmed me. I've no idea how long we stayed under -- time passes very slowly when you're in a hippo's mouth.

The hippo lurched suddenly for the surface, spitting me out as it rose. Mike was still waiting for me in his kayak and managed to paddle me to safety. I was a mess. My left arm was crushed to a pulp, blood poured from the wounds in my chest and when he examined my back, Mike discovered a wound so savage that my lung was visible.

Previously, previously, previously.