R2’s physics in ROTS is cartoony to me mostly because it is just so contrary to how we see R2 look and behave in all the rest of SW.
I’d still like to see a version of the scene, with Obi-Wan tossing the comlink at R2 only for it to realistically hit his dome sharply and clatter to the ground. As if someone threw a handheld phone at a metal refrigerator.