The first time i seen Metellica ((Ride the Lightning)but they also did alot from Master of puppets) was in 1985 with Wasp, they backed up wasp but it shouldve been the other way around cause they blew them away, wasp did not want to come out after such a great performance so metellica came back out and did their concert again only twice as fast, than wasp came out and did two songs and left, metellica came back out for the encore.