User blog comment:BatMario753/Super Mario Odyssey Calc-Ouch, Mario.../@comment-33067344-20180521035019/@comment-33067344-20180601160240

Nevermind the above comment; I see issues with this calc.


 * Firstly: Clouds do nowhere near appear at 12m of height (also source for castle height?). 3km is the default assumption on these cases.
 * This makes the total distance 2993km.
 * Secondly: The timeframe assumed seems off; iirc the mid-end assumption is 10s.
 * This makes the speed 299300m/s.

Applying KE formula (using the weight you gave)...


 * KE: 0.5*m*v^2
 * KE: 0.5*70.3*299300^2 = 3.148754e12 joules, or 752.570 tons of TNT, Multi-City Block level+