Well, not literally lightning speeds, but not too far behind.
In 0.2 seconds, the lightning travels 373.0 px, so
373.0 px / 0.2 seconds = 1865.0 px/sec
And yes, it's pretty reasonable to say it's cloud-to-ground lightning given it's coming from a cloud and going towards the ground, that's just logic.
Anywho, to compare Mario's speed, I overlaid the second and third panels to get how far he jumps in relation to the ground below him:Note that, because of the "shake" effect on the camera, Mario appears to jump a bit higher than he actually does. Hence, the lines were drawn to the individual floors themselves.
90.82 px / .1 second = 908.2 px/sec
Natural Lightning's Speed is 440000 m/s (or 150000 m/s for you OBD folks.)
440000 m/sec / 1865.0 px/sec = 235.9249 m/px
X 908.2 px/sec = 214267.024 m/sec
This translates to Mach 629.660, or Massively Hypersonic.
Converting to the OBD value is easy, just multiply by (15/44) and get 73045.576 m/sec, or Mach 214.657.
Mario Jumps: 214267.024 m/sec