[zython]

Without overfull hbox warnings this is just half the fun :(

[dredmorbius]

Or: we need scroll-wrapper for printed documents.

(I'm now thinking of various pop-up book elements, sliders, etc., which could be used as dynamic online elements are in HTML.)

[TeMPOraL]

Well, it's not real LaTeX unless embedded images come out wrong size and 1-10 pages before or after they were inserted in the source.