I was not aware of Thundercat until his crazy and surreal performance on “The Eric Andre Show” on Adult Swim. That also seems to be all that the Coachella audience was aware of as he took the stage there a couple of years ago. I think many viewed it as a sort of sideshow and they certainly did not expect the jazz odyssey that followed. A set that started with a tent-full of eager young festival-goers quickly became a scene of confusion followed by a bit of an exodus. Not everyone was in the right headspace to hear some challenging music, which is a bummer for them, because eventually there was a cameo appearance by Michael McDonald, a fitting end to an unusual set.