

In _The Eminence in Shadow_ episode 2, Cid is "training" with Claire and when
Claire is about to slash him, he moves so fast that he's able to side-step,
slash his sword 4 times, go back to his original position, and pretend that he
got hit. After the fact, Claire acts as if nothing abnormal happened, as if
Cid had never done anything, but she feels a small chill on her neck (where
Cid almost slashed).

The human eye can't see things moving faster than 550 mph (which would be ~1.6
the speed of sound).

But is moving at Mach 2 speed enough to replicate what Cid did? Or would it
have to be a whole other scale like the speed of light?

I'm looking more for a ballpark rather than an exact number, just so I can
understand what is Cid's speed.

[Cid slashes Claire 4 times and pretends nothing
happened](https://youtu.be/wpvEu_HwlyM?si=7bZg2JUNmnhaptTh&t=23)

**At what speed does he move? Sound? Light?**

* * *

Other instances of his insane speed:

  * [Shadow (Cid) disappears from a "War Goddess" sight and appears behind her, she can't focus on him like she can't focus on every single rain drop](https://www.youtube.com/watch?v=5NtYF-FhtyM)
  * [Mundane Man (Cid) is fast enough to create after images](https://www.youtube.com/watch?v=IrWRMXHFQrg)


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2023-10-17T23:18:31.270
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question
the-eminence-in-shadow
How fast does one have to be to move several times in front of another human and be unnoticed?