Pink Floyd‘s thirteenth studio album, A Momentary Lapse of Reason, almost had rapping on it. Possibly due to an, ahem, “momentary lapse of reason” on the part of producer Bob Ezrin.
“So, here they are siting next to me on a sofa, and Mick was telling me what he wanted in a producer. And Keith was telling me why he didn’t want a producer! And they would not yield the conversation to each other. It might have been ten minutes — it was probably five — but they both talked at the same time and would not yield to the other guy!”