pinch the top of the bladder! just make sure you dont cut it!!!!dont worry bout it so much. you have already butchered them so you dont have to worry about weather or not you will be able to handle seeing everything, and you have to know your way around a knife doing that! you know what is meat and what is not, so just remove everything that isnt meat! you already know more about it than most people do when they field dress a deer for the first time! good luck this season!!!!