Nature guide Paul Templer was leading a group down a river near Zimbabwe's Victoria Falls in kayaks when a male hippo attacked them.
"The solid whack I felt behind me took me by surprise," Templer told The Guardian (UK). "I turned just in time to see [apprentice] Evans."
"He had been flung out of his boat, flying through the air. His boat, with his two clients still in it, was lifted halfway out of the water on the hippo's back."
Templer then instructed another apprentice to guide everyone to a cluster of rocks nearby as he attempted to rescue Evans from the water.
But before he could, "I was engulfed in darkness," he recalls.
"It was as if I had suddenly gone both blind and deaf."
That's because he'd been swallowed by a hippo.