there's this french comic called 3" by Marc-Antoine Mathieu (Amazon link), it shows almost 4 stories that happen at the same time in three seconds in slow motion, and the way they did this was by
drawing millions of the sames panel
with slight variations, IE zooming in, on each =P
example:
in summery more panels = slower time and pace, less panels = faster time and pace =P
hope it helps (Also check out 3" it really is a good silent B&W graphic novel )