Two concerts/bands come to mind.
FIRST CONCERT:
Late 1980's Bob Dylan concert in Calgary AB. Tracy Chapman was the opening act, and this was like her very first set ofconcerts since writing "Fast Car". No-one in the audience knew who she was, and she kind of went on for a long time, but was overall quite good. Of course, this was just as she hit the big time and got lots of awards, but who were we to know that night.
But this is not about her (she was good). It's about the subsequent Bob Dylan concert. Utter crap. He never sang or said a single articulate word the entire night. He kept his back turned to us 90%+ of the time, and mostly spent his time on stage trying to mess with the band... changing tempo suddenly, playing wrong chords (then turning and grinning at us briefly to show it was intentional), and generally just trying to ruin every
song he "sang". Horrible, horrible performance.
If since noticed that especially with Bob Dylan, but also with a LOT of "performers", unless there's a video camera taping the show, they phone it in. For example, notice how good Bob was in the Band's movie "The Last Waltz", or any video of the Traveling Wilburys"? I rest my case.
SECOND CONCERT:
1994 - daughter's birthday. Again, Calgary. This time Aerosmith was the headliner. This was the second (famous) incarnation of Aerosmith, with all the big hits still being played on radio. The Aerosmith concert was absolutely one of the best concerts I've ever attended. Every song seemed to be done with the proverbial 110% effort. No wrong notes, no slip-ups. Just high energy from the whole band all night. It was about 2 hrs long as well, and every big hit was played, including a couple of encores. (I thing "Dream On" was the final encore). Awesome.
We were seated above one side stage, and I got to see the "underneath the stage" area - where the guitar technician would grab and re-tune each guitar between songs. It was very cool to watch.
BUT THE OPENING ACT. Sorry, I can't remember the name of the band, but they were "heavy metal" (or a poor facimilie). My daughter was into metal at the time, so White Snake and Poison were big on her playlist... until I got sick and tired of it and played her my Led Zeppelin albums. Then that was what she loved. It always helps to play the good stuff to someone who's only heard the dreck.
Anyway, my daughter warned me about this opening act: "Dad, they can't sing, can't play and look like crap. BUT THEY HAVE A CHAINSAW!!!". Well, she was correct on all counts. To this day I cannot recall anything at all they sang/did, except... they really did have a chainsaw for the last song. It was a real chainsaw, and they really started it up. Noise and 2cycle smoke everywhere. They ran it for a good several minutes before shutting down. So terrible band, but they DID HAVE A CHAINSAW!!! :-D