In chapter 6 of Seven deadly sins, Meliodas dodges Gilthunder's sword strike which was imbedded with lightning and the lightning is shown to move before his sword completes the swing
Due to Meliodas dodging the lightning and the strike before it could complete it's semi rotation i'll measure the distance between Meliodas initial position and the lightning
Height Of Meliodas: 1.52m
Distance between Lightning and and Meliodas : 0.51m
Speed of Lightning: 440,000m/s
Timeframe: 0.51/440,000=
0.00000115909 seconds
Distance Meliodas covered: 3.16m
Speed: 3.16/0.00000115909= 2,726,276.64806m/s or Mach 7,948 (Massively Hypersonic+)
Revised[]
As per requested, I need to find the entire length of the lightning ark(which i don't agree with but whatever)
Here's the image i'm going to be using below
Gilthunder Arm: 0.54m
Gilthunder's sword: 0.67
Total: 1.21m
Circle circumference (2 * pi * radius)
(2*3.14*1.21)= 7.5988
7.5988/2= 3.7994m
Distance Lightning traveled: 3.7994m
3.7994/440,000= 0.000008635 seconds
Meliodas' speed: 3.16/0.000008635= 365952.518819m/s or Mach 1,066( Massively Hypersonic+)