My most memorable ROCK moment

Pink Floyd, "The Wall" concert. Bruce Springsteen and the E street band some time in the 80's. Rock Nirvana.

Stevie Ray Vaughan at Fitzgerald's, in Houston.

If your standard for "great" is arena rock, you missed the boat. There is no way a great player can really stretch out in an arena. Many times I heard Albert Collins, Lightin' Hopkins, BB King, John Lee Hooker, Albert King, and Alan Haynes in small clubs. Far more enjoyable and amazing than the Who, Stones, Led Zep, Eric Clapton etc. in big arenas, great as some of those shows were. I only wish I could have heard those guys before they made it big. John Lee Hooker, in particular, could get the place going so that every single person in the joint was boogieing along.
Some Grateful Dead shows were great. To the extent I remember them...

Led Zep, jethro Tull Vanilla Fudge in in 1969 in a small venue in Chicago All in one night....a mind blower

Ryriken.
Very nice.

New Year's Eve, 1999>2000. Phish held a festival for 80,000 on a Seminole reservation in the Everglades. The band played Auld Lang Syne at midnight, and kept going until the sun came up at 7:15. No breaks.

I was never the same.