When I was six, I one time found this big ass caterpillar in my lawn. It was being attacked by multiple ants, so I first killed the invading ants, then I squeeze the caterpillar's guts out of its behind. I was so awed by how many organs a simple insect could have, as I have seen some that probably would have been one of its hearts or livers. It was all green and messy after I was done.