News Aliens, Stay-Puft Marshmallow Man added to South Dakota’s eerie green sky by Reddit users July 8, 2022July 8, 2022Trevor J. Mitchell, Sioux Falls Argus LeaderComments Off on Aliens, Stay-Puft Marshmallow Man added to South Dakota’s eerie green sky by Reddit users The strange green color of the sky in Sioux Falls, South Dakota from a Tuesday derecho has inspired many memes on the internet over the past week.