Quick flash :)

SELECT * FROM gallery2 WHERE topic_id="27018" UNION SELECT * FROM gallery2 WHERE topic_id="232006" UNION SELECT * FROM gallery2 WHERE topic_id="422692" UNION SELECT * FROM gallery2 WHERE topic_id="1457043" UNION SELECT * FROM gallery2 WHERE topic_id="1379171" UNION SELECT * FROM gallery2 WHERE topic_id="883395" UNION SELECT * FROM gallery2 WHERE topic_id="1363567" UNION SELECT * FROM gallery2 WHERE topic_id="1251794" UNION SELECT * FROM gallery2 WHERE topic_id="1571111" UNION SELECT * FROM gallery2 WHERE topic_id="1666066" UNION SELECT * FROM gallery2 WHERE topic_id="640066" UNION SELECT * FROM gallery2 WHERE topic_id="316581" UNION SELECT * FROM gallery2 WHERE topic_id="1612654" UNION SELECT * FROM gallery2 WHERE topic_id="257860" UNION SELECT * FROM gallery2 WHERE topic_id="1422712" UNION SELECT * FROM gallery2 WHERE topic_id="1284553"