Last Sunday May 29th James Hetfield got on stage with Corrosion Of Conformity at Fox Theater in Oakland and sung with them “Seven Days”. Those two bands has their own history as COC used to open for Metallica in the early ’90s, while James contributed backing vocals on the song “Man Or Ash” on the album “Wiseblood”, while Pepper Keenan was a guest on Skynyrd’s “Tuesday’s Gone” on “Garage Inc.”. Finally, it’s worth noticing that Hetfield said that Keenan’s return to COC was one of the “top 10” things in 2015.