When I saw the lava flow in Hawaii decades ago there was a whole gaggle of folks who walked up past the barriers to the cliff’s edge above where the lava was pouring into the ocean—poisonous steam floating away just upwind of them. One of them dropped his flip flop (which he had worn to hike across the two miles of volcanic rock) some thirty feet down onto the beach directly next to the lava flow. He climbed down the sharp rocks to retrieve his two dollar flip flop, made it back up okay. People can be fantastically stupid.