A friend of mine had set his backpack down on the beach while he went swimming in the ocean. Those of us still on the beach saw a huge baboon walking towards us. We all took a few steps back, but the monkey went straight for the backpack and started rustling through its contents. One of my professors through his flip-flops at it, but the baboon did not leave. Eventually, it dragged the pack up to the top of the sand dune. None of us were sure what to do to recover the bag. Suddenly, out of nowhere, an ostrich came running straight at the baboon (http://www.inaturalist.org/observations/1198222). The baboon took off running down the beach, and the ostrich simply turned around and walked away.