Into the Inferno (2016)

I've never been close to an active volcano, but they terrify me, nonetheless. Dir. Werner Herzog's documentary explores the dangers, beliefs and mindsets of people that choose to live near them. He's aided by volcanologist Clive Oppenheimer, whom he met during his Encounters at the End of the World (2007). They meet people who put their life on the line in order to observe and measure the phenomena, and villagers who believe that demons and/or gods reside in the craters, from Indonesia to Ethiopia, Iceland, and even North Korea; it drifts off topic a little in the latter location, but the insights gained by Herzog about the secretive country's shared ideology are as scary as the unpredictable magma, albeit in a wholly different, uncomfortable way.
Note: there’s some brief but upsetting imagery involving volcano victims.

3½ seismic heartbeats out of 5