...he did a killer cameo on one of Martin Mull's comedy albums years ago ("I'm Everyone I've Ever Loved"), when he was at his "Heart of Saturday Night / Nighthawks At The Diner" early-career peak.
http://1.bp.blogspot.com/_0YLDid0sWu8/S7N_NDGvZbI/AAAAAAAAEuk/VQP-pklVM80/s1600/FRONT+folder.jpgMartin Goes And Does Where It's At
MM: Hey buddy, excuse me!
TW: Yeah yeah...
MM: Can I get you over here for a second? I have...
TW: Hold your horses, man. I'm busier than a set of jumper cables at a Puerto Rican wedding, man.
WAITRESS: I need a Mai Tai, a Brandy Alexander and a draught, light.
TW: Yeah yeah yeah...
MM: I could use another one though. I don't usually do this. It's just that... I'm in the music business. You ever get anybody in here from...
TW: Yeah well. Things are tough all over, man. What else is new?
MM: Yeah... Today my company made me do a disco record. I mean, it's just... As I said, I don't usually do this. I'd really like another one, if that's all right. You don't mind pennies, do you?
TW: Oh, we can always use pennies.
MM: Oh, fantastic. Wait... (the sound of a shitload of pennies being thrown on the counter)
MM: I think I eh... I think I got enough there for a double.
TW: I think you got enough there for a funeral.Written by: Martin Mull and Tom Waits © 1977
Published by: , © 1977
Official release: "I'm Everyone I Ever Loved" (ABC/MCA AB-997) - Martin Mull, 1977
Spoken word: Tom Waits, Martin Mull
http://www.tomwaitslibrary.com/lyrics/talesfromtheunderground2/martingoesanddoeswhereitsat.html