All Intensive Purposes

According to Gregg Easterbrook, Edvard Munch's The Scream was inspired by the eruption of Krakatoa:

Chemicals pumped into the sky by the 1883 explosion of the Krakatoa volcano colored sunsets around the world as red as blood. In an era before television and Internet people did not know a strange-looking atmosphere was about to happen. Munch was walking with two friends in Oslo and observed the sky turning blood-red. The painter was terrified by this unexpected omen: "I watched the flaming clouds over the fjord and the city … I stood there shaking with fear and I felt a great unending scream … I painted the picture, painted the clouds as real blood."