This is a really amusing technique. I cannot wait telling you how to practice it.
First you should ask a friend to join you. Of course he or she should be animation lover and a bit patient… you will see why I say patient!
Your friend should be able to act like an actor, to be more specific, like a live puppet; because his acts and intervals between each act are really important. The process is exactly like clay animation, but here it is a human instead of clay.
Ok, start your pixilation animation…
Your friend should take a pose, and then you take a picture. Be careful he should stand in a fixed place and his acts should be in one line otherwise when you put them in a sequence it will be ridiculous. And of course your camera should be fixed in a place, too.
You can add objects to your story and make it funnier.