As i understand a theory, our perception that we experience the world in real time is an illusion and our conscious "observer" is always a fraction of a second behind our sensory inputs, experiencing only the bits that our subconscious thinks we need to know about.
I guess in an emergency the editing suite thinks that more information is needed.
In @Fullerene's analogy, we' re always recording at 56 frames/sec, viewing at 28 and usually view every second one but view them all if we need to.