The Pince bunny had some comical potential, I think; I imagined it as a rather crazy detective story, and I distinctly remember that at one point Snape was going to fly up a chimney on a rickety broomstick to try and see if the thief could have escaped that way. The broomstick (a Shooting Star) made it into my long, as yet unseen, WIP, but I found that the rest was really beyond my capacity. One thing I've learned while writing fanfic is where my limits as an author lie :-).
Nowadays I tend to see Brynhild as Bromelia come of age; they still share a lot.