Complex sentence: Jerry, sleeping in a hammock with a sailor's hat on, is woken up by the smell, which seems to have a life of its own, as it drags backwards and takes a sleeping Jerry with it.
Split into simpler sentences: Jerry, sleeping in a hammock with a sailor's hat on, is woken up by the smell. The smell seems to have a life of its own, as it drags backwards and takes a sleeping Jerry with it.