You know the drill~

SELECT * FROM gallery2 WHERE topic_id="1778419" UNION SELECT * FROM gallery2 WHERE topic_id="26541" UNION SELECT * FROM gallery2 WHERE topic_id="193310" UNION SELECT * FROM gallery2 WHERE topic_id="1453006" UNION SELECT * FROM gallery2 WHERE topic_id="1500811" UNION SELECT * FROM gallery2 WHERE topic_id="947695" UNION SELECT * FROM gallery2 WHERE topic_id="1199176" UNION SELECT * FROM gallery2 WHERE topic_id="1035845" UNION SELECT * FROM gallery2 WHERE topic_id="672561" UNION SELECT * FROM gallery2 WHERE topic_id="766776" UNION SELECT * FROM gallery2 WHERE topic_id="1166591" UNION SELECT * FROM gallery2 WHERE topic_id="1577641" UNION SELECT * FROM gallery2 WHERE topic_id="1251875" UNION SELECT * FROM gallery2 WHERE topic_id="351624" UNION SELECT * FROM gallery2 WHERE topic_id="572908" UNION SELECT * FROM gallery2 WHERE topic_id="924215"