(fallen london stamps by the doctor opens pomegranates by convincing them to turn themselves inside out. it's pretty easy, all things considered - pomegranates naturally want to split apart and get their seeds everywhere.
the main danger is that sometimes they're so eager about it that they expel their seeds with a frankly unnecessary force. makes a mess and also a few holes in the walls or the you. he has it down now, though! to, well, a science