How long ago did you feed your snake? Almost sounds more like regurgitation than a poo. Someone else will be around soon and they'll able to tell you better than I can. I'm relatively new to bp's.
Edit: the people that will be able to help better will probably want to know your temps and what not to help figure it out. You'll probably get helped faster if you can post temps and the tank setup now so they'll have the info as soon as they read it rather than have another post asking your temps and then waiting for your reply and then their reply.
It's late [early?] and now I'm babbling so I'm going to bed... best of luck though and I do hope it's nothing serious.