During the final Oogie Boogie fight, Jack sends down a volley of hailstones upon Mega Oogie and one big stone in particular that sends him reeling.
Oogie Height[]
According to Flashlight’s calc, Mega Oogie is 6.941870437 meters and in this screenshot that I took, the pixel count comes up to 1276px
6.941870437/1276 = 0.00544033733 m/px
During the fight, Oogie is only 594px
0.00544033733*594 = 3.23156037402 meters
The Hailstone[]
Oogie’s top body is 404px and 3.23156037402 meters
3.23156037402/404 = 0.00799891181 m/px
Axis A/C of Hailstone = 318px
0.00799891181*318 = 2.54365395558 meters
2.54365395558/2 = 1.27182697779 meters
Axis B of Hailstone = 355px
0.00799891181*355 = 2.83961369255 meters
2.83961369255/2 = 1.41980684627 meters
Volume: 1.41980684627*1.27182697779*1.27182697779 = 2.29659984861 m^3
Density of Ice is 920 kg/m^3
2.29659984861*920 = 2112.87186072 kg
The diameter is 2.83961369255 meters or 2839.61369255 millimeters
1.4*2839.61369255^0.8
= 810.467202945 m/s (Supersonic)
0.5*2112.87186072*810.467202945^2
= 693927427.871 Joules or 0.1658526357244264 Tons of TNT. (Small Building level)
Mega Oogie and Jack scale and Jack should have Supersonic attack speed for the hailstorm.