Panel 1: Man, I had a LOT of trouble with the curve of that g-d park bench. I chose this particular type because I thought it would look more interesting than a more angular bench, but I inconveniently forgot that curves can prove very, very tricky when drawn in perspective. IIRC, this bench might be referenced not from a photo, but from a 3D model used in the Ken Akamatsu’s manga Negima!; sadly, I did not have access to such a CG model, which might’ve been extremely helpful.
As mentioned earlier, those shuriken in the extreme foreground should arguably be depicted as spinning—but here, I like the “freeze-frame” look of the projectiles, which seem to zoom past the camera akin to the Star Destroyer racing overhead in the opening scene of Star Wars: A New Hope.
Panel 5: Ouch!