I follow the Caving Podcast when it appears every month. Usually the stories are pretty local to US and Indiana, where the podcast is made. But this time the story they told was very interesting for everyone.
Everyone knows that one shouldn't go underground because it is dangerous, similarly one should never go into the holes inside a glacier because it is dangerous, volcano craters are always dangerous, and we should all stay away from places where volcanic gases are being emitted, because it is dangerous.
Christian Stenner broke all these rules -- at the same time -- in this podcast episode: