to me a GREAT rock concert will make me 'slightly nervous'. when performers rise above ego, safety, planning and simply play with abandon, I get the feeling that I'm connecting to something that could 'go wrong' at any moment, an edginess, a slight foreboding comes with pushing boundries. a GREAT rock and roll performance 'goes there'. When Roger Daltrey swings that mic around and around (is it going to come loose and hit me in the audience, or him on stage?)...Pete smashing a 'perfectly good guitar', Jimi setting his guitar on fire, (heck, back in the early days,  Jerry Lee Lewis setting his piano on fire, kicking that piano bench and plopping his leg up on his 'pumpin' piano, Elvis' hip shaking inspiring swoons and sexual connotations), danger lurks in a great performance.  I often say I was 'born at the right time' because I got to expericence rock's pioneers and have never stopped appreciating what has become 'classic' rock, while still discovering newer groups who take me to that level of 'dangerousness' with their live shows. These days Foxy Shazam and FooFighters are examples. The Foos' Dave Grohl was, of course, the drummer for seminal grunge band Nirvana. He beats the drums with that abandon I spoke of, while Curt Cobain knows how to twist those guitar and amp knobs to get the kind of feedback Jimi Hendrix made as the foundation to his sound. And there is that danger, that aspect that you'd better soak this in now cause it could end at any minute. Of course for both Hendrix and Cobain, it did indeed end. I think that , even if you're not a fan of grunge, you can feel the '60's 'all-or-nothing' performance of a Who show or a Hendrix gig when you watch Nirvana Live at the Paramount. See if it's on one of you music channels on tv, or look for the dvd. ...and don't foreget to play it LOUD, like yer there!