Continuing the chain . . .
This reminded me of the autobiography (together with Rowland Barber) of Harpo Marx titled
Harpo Speaks. Excellent book. The story of how, after the Marx Brothers had stopped making films, Harpo (The silent one) was a guest speaker at an event and would not stop talking is alone worth the read.

That and Harpo explains the origin of his trademark “throwing a gookie.” ---->