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Introduction

In Xayah and Rakan's Teaser, they blitz some of Zed's Order. Clearly they are fast, but just how fast are we talking here? Well, pretty fast.

Assumptions

1. Rakan and the Assassins are around the normal height for a man, or 176.1 cm.

2. The Assassin measured is at rest when the calculation begins. He is either at rest or already falling, since the next frame he moves down, and the latter result would yield even high results than were found.

The Calc

So, Rakan knocks some guys into the air and then Xayah pops them all with feathers. Just show fast did Xayah chuck those babies?

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Xayah's total height in pixels is 222.01. The average man is 176.1 cm, so that makes each pixel 0.793 cm. Xayah's feather (which is behind Rakan and thus at LEAST moving this far) starts a 803x258 and ends at 0x143 on the co-ordinate plane, which indicates a Y movement of 115 and X movement of 803. Together this gives a hypotenuse of 811.19 pixels covered, or 643.273 cm. For meters, we get a rounded 6.433 meters.

So that's distance, but what about speed? The frame starts at 38.37 seconds and the final frame starts at 38.6 seconds into the video. This is a total time of 0.23 seconds. Now we just put distance over time to get a speed of 27.97 meters per second. But wait a second...

Rakan and Xayah were in slow motion during this whole sequence, so that's not the actual speed these feathers were moving. So we need to find out just how much slower the world was moving for them, and to do that we need to look to physics.

An object at rest will begin to fall as it is accelerated by gravity. There are many ways to find out how far or how fast something will be moving, but for our case we can calculate how much faster they were moving by taking the distance one of the airborne assassins fell and comparing that to the distance he should have fallen.

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The shot begins at 38.94 seconds and ends at 40.33 seconds in the video, which gives the dude 1.39 seconds to start falling. In the span of 1.39 seconds, assuming he is at rest (even though he could be already falling, which makes this a lowball), he should move 947.371 cm. Thanks to the guy in the middle that is in a relatively easy to measure position. His body lengths are 90 pixels and 34.12 pixels, respectively, for a total height of 124.12 px. Assuming he's also average, that gives us a pixel size of 1.419 cm.

His first position is at 143 on the Y axis and his next position is at 195 on the Y axis. So this indicates he moved down 52 pixels, or 73.788 cm. A fair bit shy of the 947 we should have seen. However, the perspective shifts. This actually may be hurting our results a little bit, so let's try and compensate for it. If I am thinking correctly, I would take a normally stationary object, such as the hill in the background, and take the distance it moves off of the assassin's distance moved to find out how much the assassin really moved. This seems reasonable, since the assassin looks like he barely moved at all during the sequence.

The hill's position is originally 230 and it moves to 273 on the Y axis. This indicates that the assassin's fall difference is 9 pixels. Thus, the assassin only really fell 12.771 cm and the rest was just camera shift. Just in case I messed this concept up, I'll calc the low end without the compensation.

As a disclaimer, unless I messed up the thought process behind the compensation, the high end should be used.

Dividing the amount he should have moved, 947.371, by the amount he did move, 73.788 or 12.771 (for without and with perspective compensation, respectively), we find that this scene is moving 12.839x or 74.181x slower than normal, respectively.

Applying this to our speed gets our final results:

Low: 12.771*27.97 = 359.101 meters per second

High: 73.788*27.97 = 2074.843 meters per second

Final Tally

Xayah's Volley Low: 359.101 meters per second, Transonic

Xayah's Volley High: 2074.843 meters per second or Mach 6.049, Hypersonic

NOTE: Please read the disclaimer and the information behind it. Unless I was incorrect in this information, the High End should be used.