Hmmm.....from that vantage point, perhaps hog's heads would make better projectiles? Hog's feet? I'm open to suggestions.
a hogs head might be easier from 7 WTC, but a bucket of entrails might make a better splat from that relatively shorter height. either way the drop from freedom tower should smash just about anything besides some depleted uranium shells.
Hog’s feet coated with lard, (sort of to serve as wadding) to help contain the energy and fired from a potato cannon. On a somewhat cold day should work pretty good.
Are hairspray powered cannons allowed in NYC?