Mark And Lou?

So, I'm sitting here listening to the Fall's 1990 album Extricate.  It was the first or second CD I bought way back in 1990, and it still plays.  I probably haven't listened to it in 15 or 20 years.  But it got me thinking.  What would happen if you put Lou Reed and Mark E. Smith in the same room with some instruments?    A songwriting collaboration?  Violence?  Smith has written some Lou Reed-ish lyrics, but Reed has never written something like "Arms Control Poseur."  I suspect their egos coming into contact would not be a good thing.