It was weird, and I never heard of Damageplan either. My friends and I were there to see "Disturbed". They are one of our favorite bands.
I was fairly familiar with Pantera, but not a big fan. When they came on the stage, I said to my friend: "Damn, these guys look and sound like Pantera." My friend said: "Holy shit, those are the guys from Pantera." Next thing I know, they kicked into a Pantera song, and the whole place went nuts. We were pretty psyched, because we weren't even going to show up for them, thinking they were just an ordinary "opening act", but we got to see a couple of legends, and the they rocked. Sadly, who would've known it would be one of the last times anyone would see them. Actually, it was a couple of months ago. The show was at the "Starland Ballroom" in Sayreville.