At this angle the bird flies very well through the wood. I'm not sure if you can shoot him in such a way that he can fly past the rock and straight through the glass onto the TNT barrel, because then he would have to fly through two wooden sticks from a different angle, which might slow him down again. In addition, not all pigs die at the same time with every hit, which in turn makes it even more complicated.

Mod note: retimed to 4.033