Okay it's been well established that objects with momentum exhibit wave like properties. Hence, electrons being observed forming interference patterns when scattering off of crystal lattices. Also I recently read this webpage. At the bottom it mentions performing a double slit experiment with cats firing them haphazardly at two slits to see if they interfere. Now obviously it wouldn't work in any normal sense. But it mentions a lot of little technicalities, one obvious one for me is that the de Broglie wavelength of any object comparable to humans would be comparable to Planck's constant, so extremely tiny slits would be needed (correct me if I'm wrong). My question is what are those other "technicalities" mentioned. Also it says that you would need to space out the firing of the cats in a time interval longer than the age of the universe, I just plain don't understand that bit, why do you need to space out the firings for larger objects that much? I figured as long as you waited until one already hits, that would be good enough. Any clarification is welcomed.