A B-52 Cumbomb is a bomb in which a gunner or engineer onboard a B-52 bomber has a sudden urge to shoot his load, so he whacks off and shoots his load off into the sky.
Meanwhile the jizzball, now
traveling at
terminal velocity towards the city below, is frozen from the sub-zero temperatures at high altitudes. That frozen ball of cum will then land on an infant in a stroller.