Slo-mo is a special effects technique in which the action appears to be happening slower than its normal speed. Often used to lend versatility to a project, slo-mo can make the output more cinematic and artistic, add emphasis, ramp up anticipation, and focus viewers on the essence of a narrative.

For example, someone pushing a door open and walking out into the street would appear to start off in slow motion, but in a few seconds later within the same shot the person would appear to walk in "realtime" (everyday speed).

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Slow-motion videos let us experience the heightened awareness of a scene in the comfort of an office chair or movie seat, rather than under actual, real duress. Slow motion is an easy shortcut to one of the oddest quirks of human consciousness.