You slowly crawl across the room, trying to make your way to the door. The body inside you is slowing you down but you're almost there... *thwack* He managed to deliver a solid blow to your head, and you barely catch a glimpse of him before you pass out.
Slowly, you start coming back to your senses as your tongue is the first to start flitting in and out of your mouth again. You seem to be in some sort of miniature landscape surrounded by square glass walls, the man from before peering at you with glee. "Hah, how'd you like it you filthy vermin? Maybe you almost managed to kill me, but now the tables are turned. There's no way you're getting out of this cage, and a snake of your size is gonna get me a fortune from exotic animal collectors!" You slither around the confines of your cage a bit, but you're limited in all four directions by glass panels, and a grate on top of it. All there currently is in your cage is a dirt bottom, a tiny tree and a bit of water. You hiss at the person outside the cage, but he just laughs and walks away. Your body is much the same, though it has practically slimmed down to its original size as the human is nearly digested. Now, how to get out of here...