In My hero academia, Lady Nagant literally explodes, but she barely survived the blast, so she might be able to downscale. Thus I shall calculate the feat
Even if that as an idea of her downscaling off this is rejected I'm still curious about the AP of this blast (Note: The explosion came from inside her so she should scale off the full yield )
Pixel scale and Math[]
Building story height 4.3m(27px)
Explosion Diameter is 720px (114.66m) radius is 57.33m
Classic explosion formula
Yield: Y = ((x/0.28)^3)/1000 with Y in megatons of TNT and x the radius in km.
(0.05733/0.28)^3/1000 = 0.00000858 Megatons aka 8.58 Tons of TnT / 2 since it isn't nuclear
Tally[]
AFO is the new Bakugo:
= 4.29 Tons of Tnt (Large Building level)