Zombies should have a spawning animation of crawling out of the ground

I believe that all zombies (or maybe just the regular zombies or certain types of zombies) should have an animation when spawning that makes them crawl out of the ground. Additionally, this should be able to be controlled via a command block for a graveyard scene in a movie, adventure map or such. The reason I think this idea would work is to make zombies a little more realistic, even within a fantasy game world. Just having a hostile mob like a zombie pop into the world is a little boring and a spawning animation (even if not made for all mobs) would fit excellently in my opinion.