It was pretty crazy. I just read all these interviews about how she doesn't lose it anymore on stage, she's sober, blah, blah, blah.
She looked calm and composed when she took the stage. she made a couple of jokes,chatted with someone in the audience and then started playing.
And then she freaked out.
She was immediately obssessing with the reverb (which in her defense wasn't working at first), then she couldn't take it when the sound guy was looking at her (first shielding her eyes, and then stopping halfway through a song to tell him he had to move), then she spent like 10 minutes trying to tune her guitar and it was STILL out of tune when she started up again, all the while starting songs and not getting through them (she was trying to do "House of the Rising Sun" over and over again).
She kept muttering, "I'm sorry, I'm SORRY," and "I'm not mad at anyone, I'm mad at myself", and "I'm just here to play music and sing songs, I didn't mean to make it into a big thing."
Finally after about 30 or so minutes, halfway through a song, she threw off her guitar, said "I gotta pee," and left the stage.
There was much murmuring. The woman next to us said she doubted that chan would come back. Some dude used this opportunity to put something on her chair (his demo? a love letter?). But she did come back, got it together, and did a fine set, though she couldn't remember what songs she had already done and still kept apologizing.