Godspeed You Black Emperor! and Sigur Rós.
I’ll admit that the first time I saw GYBE!, I was thoroughly impressed. This was between the Slow Riot … EP and Lift Yr. Skinny Fists… releases. But the second time, it dawned on me that they were intensely boring to watch. I love their music, but standing around while a bunch of musicians huddle over their instruments, barely acknowledging the audience, playing one extended crescendo after another for 90 minutes was tedious to the extreme.
Likewise with Sigur Rós, during the ( ) tour. Boring, boring, boring. Their stage presence was non-existent, you couldn't really dance or move to the music, so the show became like a torturous stand. The friend I went with and I both agree, even years later, that it was a thoroughly awful show, memorable most for our intense back pain afterwards.