Volcanic lightning might be one of the hardest things to spot, and yet when you do see it you realise that it's almost impossible to beat.
Almost impossible to predict and just as hard to capture, this rare phenomena only happens when a particularly violent volcanic eruption pushes huge quantities of positively charged debris into the air.
Happening for the briefest of moments, often hidden within the ash cloud, the lightning will arc down into the crater giving the distinct visual impression that you've just witnessed the next sequel to "The Avengers".