˙ɯɐ ı ǝɹǝɥ ʇǝʎ 'sƃuıɥʇ ʇuɐʇɹodɯı ǝɹoɯ ƃuıop ǝq pןnoɥs ʎןןɐǝɹ ı

Message sent by tapping on the plumbing of my cell. The screws will never catch on.