The four families of effects
Physics-benders (FROZEN TIME, ZERO GRAVITY, GIANT SCALE, TINY WORLD) break a law of nature — these earn the hardest double-takes because the viewer's brain flags the impossibility instantly. Atmosphere effects (EMBER STORM, GOLDEN DUST, SAKURA STORM, MIDNIGHT RAIN) fill the air with particles and mood; they're the safest way to make an ordinary subject feel cinematic.
Format effects (VHS REWIND, CRT SCANLINES, FILM BURN) disguise your clip as older media — powerful for nostalgia hooks. Style transfers (ANIME BURST, CLAY MOTION, PAPER WORLD, COMIC HALFTONE) re-render the whole world in another medium; several of these are premium presets because full-scene restyling is the heaviest render.
Why simple subjects go further
The effect is the spectacle, so the subject should be instantly legible: one person, one pet, one car, one street. A cluttered scene competes with the effect and the model splits its attention — a lone subject mid-frame lets SHATTER GLASS or PORTAL JUMP land at full force. This is also why the biggest viral formats are 'ordinary thing + impossible event.'
Front-load the payoff. If the effect is your hook, it needs to be visible in frame one, not built up to — feeds decide in under a second. Effects with a natural reveal arc (SMOKE REVEAL, BLOOM BURST) are the exception: their whole shape is the transformation.
Stacking, pacing, and posting
You can pair one effect with one camera move — FROZEN TIME plus a moving camera is the bullet-time formula; GIANT SCALE plus WORM EYE makes the colossus tower. More than one effect at a time muddies both. Match energy too: percussive effects want short clips and hard cuts, atmospheric ones survive longer edits.
Model choice: Sora 2 excels at imaginative, reality-bending premises; Kling models hold coherence when the effect must interact convincingly with a realistic subject. Generate a few takes and post the one where the effect peaks earliest.