One early morning in April 2012, a man hurried through some woods in coastal France. He lived nearby, and had seen a column of smoke coming from this area. So now he was there to make sure it wasn’t a brush fire or something. And when he finally found the source of the smoke, he relaxed. It was just the smoldering remains of a bonfire. But as he approached, he smelled something that wasn't just burnt wood. And when the man finally saw what was in the fire, he felt sick.