The czar

The largest explosion created by human beings (let's face facts: men) happened in the 1960s. The Soviets managed to rig up a bomb that could pack so much force that thare would be no way for the flight crew to escape if they dropped the bomb and fled in a jet; they named it "The Czar Bomb". So they rigged the bomb up with a parachute. Even so, it was close. This bomb released the energy of several thousand Hiroshimas. Several fucking thousand. The shockwave circled the globe three times. After that, the emphasis shifted from massive single weapons to clusters of smaller weapons. Sometime after that, the US and Soviet Union got enough nuclear firepower to destroy each other at least a dozen tmes over. A fucking dozen times over.

It's interesting that we've come from freaking spears and clubs to fire that can break the firmament of the heavens. Literally: the force of The Czar ripped its way past the cloud ceiling and continued to I know not how high.

Consider: "the industrial areas that surround our nation's highways are sorely lacking in hookah-smoking caterpillars."