This was SunDaGamer's response to the invalidation of his calc in that recent JJK speed thread
SunDaGamer's calc is the 6000 mach one for Hakari ""dodging"" lightning.
vsbattles.fandom.com
Now here's a debunk of that calc itself. It's just wrong.
The debunk is in the imgur description but I'll paste it here.
x = the distance between the lightning bolt and Hakari's head, this we can derive the time frame from the speed of the lightning and the distance.
a = the distance Hakari's head would have to move to avoid an attack that traverses distance [x].
we use [x] to calculate a time frame (call this [z]), and then perform [a] / [z] to get mach 1,000.
b = the distance Hakari moved in total in order for his shoulder to be where his head was previously.
y = the distance between the lightning bolt and Hakari's shoulder.
SunDaGamer, in his wrongness, wants to perform b
/ [z] - using the distance Hakari moved in total with the distance the lightning would reach Hakari's head - however this is evidently not true given the lightning reached Hakari's shoulder once Hakari moved , which wouldn't be accurate within time frame [z], therefore it's not an accurate portrayal of speed.
Credits goes to @Rosa for the debunk.