Videos showing divers swimming among large sharks, without cage protection, are commonplace. In most cases the sharks look accustomed to people and do not appear threatening.
But check out the tiger shark in the accompanying footage. It looks agitated, and it's sporting a deep and seemingly fresh wound on the left side of its head.
The footage was captured in murky water at Protea Banks off South Africa.
Shark Attack News points out in a website post that the shark can be heard snapping its jaws at the 14-second mark (turn up the volume). It also notes the downward-slanting pectoral fins.
Clearly, this shark did not appreciate the company, and the diver probably considers himself fortunate to have been able to swim away.