At one point in the opening monologue, the camera catches the reverse side of Eric's newspaper, showing a large print script pasted over the newsprint for Eric to read.
Eric is unexpectedly assailed by a rogue fly in the studio, buzzing round his head during the opening preamble ("He's back again, that fly!").
On the right-hand side of the picture, the camera lining up for the next shot pulls into view.