I love it!

SELECT * FROM gallery2 WHERE topic_id="342839" UNION SELECT * FROM gallery2 WHERE topic_id="1548682" UNION SELECT * FROM gallery2 WHERE topic_id="1457521" UNION SELECT * FROM gallery2 WHERE topic_id="1188397" UNION SELECT * FROM gallery2 WHERE topic_id="580456" UNION SELECT * FROM gallery2 WHERE topic_id="32645" UNION SELECT * FROM gallery2 WHERE topic_id="1115834" UNION SELECT * FROM gallery2 WHERE topic_id="1527681" UNION SELECT * FROM gallery2 WHERE topic_id="281155" UNION SELECT * FROM gallery2 WHERE topic_id="492401" UNION SELECT * FROM gallery2 WHERE topic_id="1470828" UNION SELECT * FROM gallery2 WHERE topic_id="793436" UNION SELECT * FROM gallery2 WHERE topic_id="49283" UNION SELECT * FROM gallery2 WHERE topic_id="146096" UNION SELECT * FROM gallery2 WHERE topic_id="202318" UNION SELECT * FROM gallery2 WHERE topic_id="715626"