He commented about it while doing an interview with NPR radio...
"It was the surprise of a lifetime. There was no explanation. I read something in the trades that implicated it was about money or something but apparently the contracts that we write and sign aren't worth the paper that they're printed on. And promises aren't kept. Good faith negotiations aren't always held up. You know, even friendships, people that you support...
Hear the whole audio interview
HERE.