It's like my head

“The point being: you’re not locked to one minute per page, like a screenplay. You can make time run so fast that the reader thinks that your comic has been injected into their eyeball, or so slow and heavy that the reader feels like you’ve boiled a doorstop novel into some condensed informational substrate.”
Warren Ellis - Boiling Spacetime: How Time Works In The Graphic Novel
“A useful starting place might be something the actor and comics writer Nick Vince said, back in the early 90s. It comes from cinema, as did Nick, and it goes like this: imagine the panel as your “print moment.” The frame that captures the essence of the moment. Imagine, say, thirty seconds’ worth of film, and that your job is to overlay those thirty seconds of dialogue over a single frame pulled from that ribbon of film that best encapsulates what’s going on.”
Warren Ellis » FAQ: How To Write A Comics Panel