Saw him do 30 at a festival this weekend.
Mostly ad-libbed, and very sweary. He hauled a 12-year-old boy on stage and harangued him for about 20 minutes, calling him a "ginger c**t" etc. It mostly worked, if only for the shock value.
He had a great line about the Vikings though. Real guffaw line.
"For half a nanosecond I was tempted to join in the discussion. And then I remembered that all internet debates, without exception, are entirely futile. So I didn't." - Charlie Brooker