Isn't it entirely possible that the trajectory of this high-explosive cannon-shell can allow it to miss that wall and yet still connect with the intended victim about 15 yards beyond the wall?
Let us test my theory. Victim number 1: one person who frequents the hive of idiocy known as 4chan.
*Shell passes over the wall, and hits the intended victim right in the head, obliterating him and leaving nothing but his feet*
Well then, that's it for this episode of "Creative ways to kill dumb****s". Tune in next time where we pull in President Obama to be our celebrity victim of the week, with special guests Sarah Palin and Hillary Clinton!