by James Eatock: http://bustatoons.blogspot.com/2006/08/proscenium-arch.html

What is the proscenium arch, and how exactly is Sy-Klone crossing it?! The proscenium arch in theatres is the arch that separates the play itself from the audience; so to "cross the proscenium arch" would mean that the actor is talking to the audience! In issue three of the UK Masters of the Universe comic in a story titled "Jewel of Fire" the final panel shows the heroes victorious over Skeletor's latest scheme, and in an odd moment Sy-Klone appears to be whispering to the reader! Even though the cartoon did this a few times I would have preferred the characters to talk to the audience more often...