There's no detailed proposal in the OP, so I assuming that the idea of applying this is for Manboshi's general speed rating / Combat Speed would be revised to
2.0467c (FTL). (Well, there's actually no profile for Manboshi so I assume the general intention is for revising characters who could scale to Manboshi in speed)
If I'm right about that, my first concern is that [assuming the interpretation of the feat and the calc are both correct] is that this would fall more under
Reaction Speed, and not a great one either:
Reaction speed is the speed at which a character can react to an event or action. This usually only grants a short movement upon reaction, whereas several movements at the same speed switch it to combat speed.
For example, let's say that character A shoots at character B with a gun and character B dodges. That is reaction speed. Keep in mind, sometimes a person aim dodges and it is not as good of a feat.
Manboshi's speed here is for a single movement done in reaction to a projectile being fired in his direction. As the first example on the page mentions, Character A [Kuma] shoots at Character B [Manboshi] with a gun [laser] and Manboshi dodges. And, as the example notes and elaborates below, this could be considered Aim Dodging:
As another example, let's say that character A uses a minigun on character B, but the minigun takes a second or two to charge up and Character B sees this. If Character B dodges it is considered aim dodging since he/she knew that the attack was going to happen.
Kuma's mouth laser takes at least some moments to charge up and
Manboshi was charging straight as Kuma, so he would've seen his open mouth and charging laser beam head-on.
So the assumption that Manboshi didn't start moving until after Kuma had finished charging his laser and shot it at him is reasonably doubtful.
But my biggest concern about it is whether the interpretation is right that this was a solid dodging feat in the first place.
The calc is proposing that Kuma's laser travelled a distance of 10.1867 m, and that Manboshi moved 20.849 m in the exact same time, in other words when Kuma's laser started moving from him mouth, Manboshi started moving upwards, and when Manboshi reached his final position in the panel, the laser touched down at the ground in the exact same instant. I'm not going to nitpick here typically for a dodging feat, if we don't have a clear look at the movements a character did, we can at least calculate what they needed to do to get out of the path of an attack - something that that they must have done otherwise they would have been hit. But I have to raise the question:
Would Manboshi even have been hit if the assumptions in the calc are wrong?
Kuma is facing down three opponents at once:
He doesn't need to land a direct hit on any of them, including Manboshi, because what his laser beams produce after they've hit is a wide explosion which we see in the next panel in the background:
More importantly we can see several background characters getting caught up in the explosion who were not close to the three Fish-Men in the first panel. So what it looks like to me is that the explosion went
past the three brothers and detonated behind them. The force of the explosion then knocked the brothers around, hence their strange poses in the panel.
And remember, an explosion takes some amount of time to form after the laser impacts, whether it be a millisecond or even a microsecond. So there is a larger timeframe here in the panel than just "the laser crosses the distance", it's "the laser crosses the distance and then an explosion forms" which all happens in the time Manboshi is moving, assuming he didn't start moving
before the laser even started moving.
I understand others may have a different interpretation of the scene of course; it's not a very clear scene with only three panels dedicated to it and a lot of guesswork required for what the characters are doing in a still image. But in cases of ambiguity, it is possible to look at the anime adaptation to see if it can clear up the details a little bit. Or at least show a different perspective on it.
Screenshot 1: The laser is fired towards the three brothers, travelling much faster than them as it is able to reach a spot behind them while they've barely moved any closer to Kuma.
Screenshot 2: The laser touches down, detonating and beginning to form an explosion.
Screenshot 3: The explosion is fully formed and the three brothers are buffeted by its force. They still haven't gotten much closer to Kuma.
Now, the anime adaptation isn't perfect. I don't want there to be any confusion that I'm relying on a non-canonical source here; I know that the adaptation isn't great because the characters don't end up in the same positions that they are in the manga panel. Manboshi is a lot closer to the ground in the anime. So I wouldn't use the clip for the profiles or for a calc. All I'm saying is that I think this showcases what the most likely intended interpretation of the scene; the three brothers didn't travel twice as fast as Kuma's laser beam and get to where they did out of pure speed. Instead, they narrowly avoided being hit and were blasted forwards by the force of the explosion behind them which is what got them into their final positions in the panel.
Personally, I think this explanation makes the most sense. Fish-Men aren't the fastest guys around outside of water; if each of them could rush Kuma at twice the speed of light then dodging his attack and actually getting closer to him then they did should've been easy. They would have been right up in Kuma's face by the time the laser actually hit the ground if they were twice as fast as it.
So to summarize my issues and why I disagree with applying the calc:
1) It's closer to Reaction Speed than Combat Speed.
2) It's actually closer to Aim Dodging to than Reaction Speed.
3) It's unlikely that Manboshi actually performed the movements that he is being assumed to do so in the calc.
4) The calc doesn't take into account the timeframe of the explosion as well.
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