This is so crazy, I watched this vid  couple of days ago, and JR sent it to me yesterday.
If you don’t know, I am a HUGE Tom Waits fan, probably the greatest American songwriter to ever live (and still living) besides Hank Sr.
He has been so ripped off by actors and musicians for the past 40 years, it wouldn’t surprise me if the Joker character by Heath was based on him.