Calc The Mighty Boosh - Imposter Moon!

The real Moon appears to rightfully accuse the false moon of impersonation. The diameter of the Moon is 3475km and has a mass of 7.35e22kg.
520 pixels = 3475km
1 pixel = 3475km/520 = 6.68269231km
6.68269231km X 320 = 2138.46154km
Timeframe is 2.77 seconds.

395 pixels = 3475km
1 pixel = 3475km/395 = 8.79746835km
8.79746835km X 140 = 1231.64557km

2138.46154km - 1231.64557km = 906.81597km

T = 906.81597km/2.77s
= 327370.386/340.29
= Mach 962.033518

Time for kinetic energy, which should be more or less straightforward.

KE = (0.5)mv^2
= (0.5) X 7.35e22 X 327370.386^2
= 3.93854783e33 joules
= 941.33552342256211887 zettatons

Final Results
The Moon confronts the Imposter Moon (speed) = Mach 962.034
The Moon confronts the Imposter Moon (energy) = 941.336 zettatons