Sea hike?

Here's a question for you: What do you suppose this guy was doing with (what appeared to be) a backpack? There wasn't a boat in sight. There was another guy to the right of this photo, also walking towards the beach. Leave a comment telling me what you think happened and/or what was going on. Tomorrow I'll tell you what I think happened.

On an unrelated note, that's Robben Island that you see in the background. While I'm in the Q&A mood - which beach do you think we were at?