After talking on the phone with my cousin, and former Testament roadie Arthur(JD Morgan)......he reminded me of the Testament Gathering Tour(Album lineup) with The Haunted, that we were both on......Somewhere back East, during a sound check, The Haunted saw Dave Lombardo(before his return to Slayer), enter the venue, and out of reverence, started to play Reign In Blood, well Dave got a big smile on his face and jumped on stage, and replaced Per on the drum set, and they played the whole song. He was pretty amazed how good the guitar players knew the song......and how good they sounded together.....it was pretty awesome to see this impromtu performance.......In fact it was then decided that they wanted to do this song live during The Haunted next live set.....We both forget what city they did this in, but they did, and the crowd went crazy.......A special treat that was only done twice.......Thanks JD for helping me remember a moment in Metal History!