[Double_Cast]

> The most energy you can extract from any type of bomb would be if it was converted to energy at 100% efficiency.

Under normal circumstances, a bomb's energy is endogenous. But in the blog's thought-experiment, the energy is assumed to be exogenous. Therefore, your assumption that "the explosion is bounded by the mass of the person" doesn't apply to this scenario. Instead of TNT, imagine a rubberband.