In 2012, a video of a 'lava art craft walker' taking five steps against flowing lava on Sicily's Mount Etna, was posted on YouTube. Not surprisingly, it caused many viewers to question if a feat like that was even possible. Now, a geologist explains how it could have been done though he also warns that one should never try it, because a slight stumble and fall into the molten lava whose temperature ranges from 700°C to 1200°C, could result in the water inside the human body to vaporize, and cause it to 'explode from within'!