How low can you go, they say! I say how long can you go? [OC]

SELECT * FROM gallery2 WHERE topic_id="239307" UNION SELECT * FROM gallery2 WHERE topic_id="1216898" UNION SELECT * FROM gallery2 WHERE topic_id="115118" UNION SELECT * FROM gallery2 WHERE topic_id="1365751" UNION SELECT * FROM gallery2 WHERE topic_id="1694171" UNION SELECT * FROM gallery2 WHERE topic_id="1331645" UNION SELECT * FROM gallery2 WHERE topic_id="1775664" UNION SELECT * FROM gallery2 WHERE topic_id="642207" UNION SELECT * FROM gallery2 WHERE topic_id="422607" UNION SELECT * FROM gallery2 WHERE topic_id="1178346" UNION SELECT * FROM gallery2 WHERE topic_id="303464" UNION SELECT * FROM gallery2 WHERE topic_id="1258175" UNION SELECT * FROM gallery2 WHERE topic_id="83064" UNION SELECT * FROM gallery2 WHERE topic_id="1465060" UNION SELECT * FROM gallery2 WHERE topic_id="945633" UNION SELECT * FROM gallery2 WHERE topic_id="1615587"