Wow! NASA has discovered that there's surf wave in the Sun! Here's the news report in the World Bulletin:
"The waves we''re seeing in these images are so small," said Thompson. "But they''re only the size of the United States," she said.
Kelvin-Helmholtz instabilities usually occur when two fluids of different densities or different speeds flow by each other. In the case of the solar atmosphere, which is made of a very hot and electrically charged gas called plasma, the two flows come from an expanse of plasma erupting off the sun''s surface as it passes by plasma that is not erupting.
What ever, this belongs to the "Something Of Interest!" department.