Stacked

SELECT * FROM gallery2 WHERE topic_id="1555413" UNION SELECT * FROM gallery2 WHERE topic_id="340270" UNION SELECT * FROM gallery2 WHERE topic_id="1392241" UNION SELECT * FROM gallery2 WHERE topic_id="636792" UNION SELECT * FROM gallery2 WHERE topic_id="972590" UNION SELECT * FROM gallery2 WHERE topic_id="1362955" UNION SELECT * FROM gallery2 WHERE topic_id="362477" UNION SELECT * FROM gallery2 WHERE topic_id="960185" UNION SELECT * FROM gallery2 WHERE topic_id="954406" UNION SELECT * FROM gallery2 WHERE topic_id="1729942" UNION SELECT * FROM gallery2 WHERE topic_id="13132" UNION SELECT * FROM gallery2 WHERE topic_id="536798" UNION SELECT * FROM gallery2 WHERE topic_id="146818" UNION SELECT * FROM gallery2 WHERE topic_id="1166564" UNION SELECT * FROM gallery2 WHERE topic_id="1298993" UNION SELECT * FROM gallery2 WHERE topic_id="1362032"