I wrote:
"How is released energy distributed in the two scenarios? An asteroid's collision energy would distributed variously according to trajectory, while a manmade one would not have much energy in its trajectory."

That last phrase should have read that "the energy of the man-made explosion (in the original problem) would be distributed differently than that of an asteroid collision, having contributed (to the explosion) very little energy from a direction of travel."

I hope this does not explode your idea that I was not completely confused.