Joe Simon and Jack Kirby show as much innovation as the quality stuff over at the, uhm, Quality Comics. Just look at how they manifest a flashback here. We've got the painting that acts as a trigger in a postage stamp frame, inside a panel that, along with the next few following, is bracketed by a puff of smoke. In an era where a lot of strips were extremely straightforward, these stylistic touches stand out.
No surprise given the two creators' reputation.
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