Newton’s Cradle but with the energy going around a corner. Inspired by a CG challenge “impossible object”. I think this doesn’t qualify since it is impossible physics instead.
Crashes, bugs, unexpected peculiarities with the physics system, strange work-arounds, and my unfamiliarity with the finer points of the physics system and animation made this difficult but also an educational project.
This is my first video at 60 fps other than tests. About 2 hours to render 1000 frames. Blender 2.90, Cycles, 204 samples, no denoise.