Concert / show meme

What was the best concert or show you have attended?
I'd call it a tie between the last Who tour and Tom Petty's Wildflowers tour, both at Shoreline in Mtn View. The Who played a week after Entwistle died and the energy from the band - and the audience - was amazing. Daltrey screaming "How could I measure up to anyone now after such a love as this"...

The Petty show was the last stop on the tour, and he played for close to three hours. It seriously rocked. Plus he played a hysterically funny song that had, as he introduced it, "gratuitary drug references".

What was the worst, or in retrospect, the most embarrassing?
When I was 12 or so, I saw the Captain & Tennille at the Circle Star Theatre.

Feel free to add your answers...