Okay, here we go....
This is the Dutch band Focus doing their song Hocus Pocus on the Midnight Special back in 1973. The song is bizarre enough as it is, but the show only gave them a little over 4 minutes to do a song that took more than six and a half. Rather than cut part of it out, the band decided to just speed it up. Focus featured the wacky but very talented Thijs van Leer on vocals, keys, etc., and the incredible Jan Akkerman on guitar.
Great song to listen to if you're in a bad mood and need something to lighten your day.
https://youtu.be/g4ouPGGLI6Q