Me and Orson Welles (2008)
"First of all, I'd like you to meet [the actor who played] Jim Hawkins, Junior, our leading man at 14 years old. Last season he made a really startling contribution to the stage history of Shakespeare's plays. This was during the course of some experiments with the Mercury Theatre sprinkler system. As a consequence of what must certainly have been extensive research in that field, he caused it to rain, actually to rain, and copiously to rain where in more than 300 years it has never rained in 'Julius Caesar' before. It rained on Brutus, it rained all over Brutus in the forum. I was Brutus, and I ought to know."
"Now, as dramatic criticism, I found this telling, and even final. But as a surprise item in the funeral scene, I can assure you that the unexpected appearance on the stage of so many gallons of real water created in us all, an impression that was almost overwhelming. Our popular leading man says that he did it all with a match. I don't dare think what he'll do when he's old enough to run for president, but meanwhile, no matter what happens to the plumbing, he can always work for the Mercury. As you've probably discovered, he's something more than a very gifted performer, and as I told you, he's something less than 15."
"His name shall not be withheld: I refer to that fine old actor Arthur Anderson." (Actor George Coulouris was credited as "having escaped 'Rainmaker' Anderson" during that incident.)
At the very end of the broadcast credits, a faint crash is heard in the background, and Welles ad libs, "There is at this moment a disturbance in the control room, and if it isn't a tumbrel, it's Arthur Anderson. It's a good thing the program's over."