I've loved George Carlin's material back to his HBO specials back in the 70's with stuff like "seven words you can't say on TV" , but my sister went to some live shows a few years back and said he rambled like he was high and went from sometimes funny to just stupid.

I guess that seems like no big suprise that he has a substance problem, but hell .. he can afford it with the money he makes ..... as long as it doesn't ruin or kill him.