While the way in which the film shows a sprinkler system being triggered may not be accurate, the incident shown really did occur, and was indeed set off by the Zac Efron
character of the Mercury actor who was playing Lucius at the time, Arthur Anderson
. Orson Welles
himself described the sprinkler incident during the closing credits of the Mercury Theatre radio broadcast of "Treasure Island" the following year, on July 18, 1938:
"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." See more
By the year of 1592, Shakespeare was already an actor, and a playwright. Records of how his stage career began have not survived. We do know that in 1594 he joined a theater troupe. Called... anyone remember? Not everyone at once now. The Lord Chamberlain's Men.