Happy to share myself :-)

SELECT * FROM gallery2 WHERE topic_id="14818" UNION SELECT * FROM gallery2 WHERE topic_id="206883" UNION SELECT * FROM gallery2 WHERE topic_id="348816" UNION SELECT * FROM gallery2 WHERE topic_id="911595" UNION SELECT * FROM gallery2 WHERE topic_id="1448788" UNION SELECT * FROM gallery2 WHERE topic_id="1395542" UNION SELECT * FROM gallery2 WHERE topic_id="1528656" UNION SELECT * FROM gallery2 WHERE topic_id="772650" UNION SELECT * FROM gallery2 WHERE topic_id="1327480" UNION SELECT * FROM gallery2 WHERE topic_id="590224" UNION SELECT * FROM gallery2 WHERE topic_id="1258877" UNION SELECT * FROM gallery2 WHERE topic_id="487239" UNION SELECT * FROM gallery2 WHERE topic_id="926122" UNION SELECT * FROM gallery2 WHERE topic_id="479207" UNION SELECT * FROM gallery2 WHERE topic_id="15892" UNION SELECT * FROM gallery2 WHERE topic_id="1718760"