I saw DP in the 80's, and they were LOUD as HELL, esp. the keyboards! My head was hurting for days, but it was worth it. I remember that organ rocking back and forth and hoping it didn't fall over and crush him. I remember Blackmore being so aggressive on the guitar and jumping around like a madman.
I was about 14, and was there with my friend. The guy in front of us had really long hair, and was spinning it around as he banged his head for almost the whole concert until he got up and puked right next to us. My mom couldn't find us after the concert when she came to pick us up. It was well below zero (fahrenhiet) that night, and we were running around outisde in jean jackets. By the time my mom found us she was livid, but when she calmed down she told us that she was looking all over outside the stadium and saw the DP guys getting into a limo. We were SO bummed and were shouting jealous profanities at my mom. She just sat there and smiled.
There's my memory. And oh yeah- fuckin' GREAT concert. Unbelievable.