The other day we have some mesmerising footage of Mount Etna, in Italy, erupting.
Today we have a different take on the natural power of a volcano.
A group of brave skiers in Italy can be seen following a smouldering boulder down the slopes of the volcano.
It rolls to a stop but carries on steaming in the cold surroundings of the snow.
There really isn’t much more to it than that. It’s simple yet brilliant.