@waxbanks already said it rather evocatively, but I'm just going to chime in and say this Tweezer is SERIOUS. Like jungles of Vietnam serious. Serious as a heart attack. Any fan of improvisatory music should hear this 50 minute segment, it gets so dark and evil during the first jam that you could turn a metal head onto Phish with a selective listening session. The song touches back down to the Tweezer riff around the 20th minute, but continues on going through a number of interesting sections varying between motion and stillness, including some crazy UFO abduction stuff and a major hose towards the end. Don't sleep on the first set either, it's really well played and contains what might be one of the finer versions of All Things Re-Considered. It's funny, on the AUDs you don't hear people going noticeably crazy over the Stairway to Heaven tease to open the show, maybe they couldn't hear it too well?