Hit it

SELECT * FROM gallery2 WHERE topic_id="20468" UNION SELECT * FROM gallery2 WHERE topic_id="1247491" UNION SELECT * FROM gallery2 WHERE topic_id="1135290" UNION SELECT * FROM gallery2 WHERE topic_id="685653" UNION SELECT * FROM gallery2 WHERE topic_id="576846" UNION SELECT * FROM gallery2 WHERE topic_id="1750217" UNION SELECT * FROM gallery2 WHERE topic_id="1197601" UNION SELECT * FROM gallery2 WHERE topic_id="1249227" UNION SELECT * FROM gallery2 WHERE topic_id="4624" UNION SELECT * FROM gallery2 WHERE topic_id="290827" UNION SELECT * FROM gallery2 WHERE topic_id="488172" UNION SELECT * FROM gallery2 WHERE topic_id="1398471" UNION SELECT * FROM gallery2 WHERE topic_id="849285" UNION SELECT * FROM gallery2 WHERE topic_id="756848" UNION SELECT * FROM gallery2 WHERE topic_id="156740" UNION SELECT * FROM gallery2 WHERE topic_id="759001"