I've seen it now on TV several times. It's absolutely hysterical. Set in the late 19th century during a theater performance, A.G. Bell is sitting in a box with his invention in front of him when it rings loudly and he answers it loudly, saying "Ah-hoy, ah-hoy" (which is historically accurate because he said that's how people should answer his invention rather than with today's conventual "hello"). He says the caller has the wrong number; his is "one" - the caller must want "two." After the distracted performers and audience return their attention to the play, it rings again and he loudly answers again disrupting everything. It's a take-off on today's totally rude cellphone users.
It's as funny as the Geico commercial spoofing horror slasher films where the victims decide not to take off in an already operating car and decide to hide in a storage-house full of chain saws (they decide not to hide in a cellar or attic where they will equally be trapped) while the killer, confused over their stupidity, approaches them. The final scene has the killer rev up his chainsaw as one of the victims screams: "Head for the cemetery!"
Gerard