By Brandy McDonnellBest known as the guitarist for the platinum-selling rock band Hinder, Oklahoma musician Mark Austin King has spent the strange days of the coronavirus pandemic getting caffeinated - or at least, getting creative with his side project, Caffeine Genius. Through Caffeine Genius, King channels 1990s alternative rock, especially music of the era by Ben Folds and Weezer, with tuneful and nostalgic results.