I first heard about Liquid Tension Experiment through ESR, who also posted this link, saying:
Skip the cheesy Wagner quote and the purple lava lamps at the beginning and prepare to be awed.
Most of the bad music of my lifetime is redeemed somewhere in this two hours; every grunt of crappy three-chord rock, sigh of excessively involuted jazz, and squeal of self-indulgent “progressive” bloat was worth living through because they fused and in the hands of genius gave rise to… this.
Liquid Tension Experiment, Live in LA, 2008.