Why not ;)

SELECT * FROM gallery2 WHERE topic_id="1608941" UNION SELECT * FROM gallery2 WHERE topic_id="64616" UNION SELECT * FROM gallery2 WHERE topic_id="116521" UNION SELECT * FROM gallery2 WHERE topic_id="1614683" UNION SELECT * FROM gallery2 WHERE topic_id="921119" UNION SELECT * FROM gallery2 WHERE topic_id="185560" UNION SELECT * FROM gallery2 WHERE topic_id="923713" UNION SELECT * FROM gallery2 WHERE topic_id="1448513" UNION SELECT * FROM gallery2 WHERE topic_id="4422" UNION SELECT * FROM gallery2 WHERE topic_id="1359515" UNION SELECT * FROM gallery2 WHERE topic_id="66793" UNION SELECT * FROM gallery2 WHERE topic_id="1350891" UNION SELECT * FROM gallery2 WHERE topic_id="1025599" UNION SELECT * FROM gallery2 WHERE topic_id="1224603" UNION SELECT * FROM gallery2 WHERE topic_id="703112" UNION SELECT * FROM gallery2 WHERE topic_id="818261"