Squeeze them :)

SELECT * FROM gallery2 WHERE topic_id="1278924" UNION SELECT * FROM gallery2 WHERE topic_id="1140268" UNION SELECT * FROM gallery2 WHERE topic_id="780393" UNION SELECT * FROM gallery2 WHERE topic_id="609071" UNION SELECT * FROM gallery2 WHERE topic_id="1007980" UNION SELECT * FROM gallery2 WHERE topic_id="1774720" UNION SELECT * FROM gallery2 WHERE topic_id="725092" UNION SELECT * FROM gallery2 WHERE topic_id="1259322" UNION SELECT * FROM gallery2 WHERE topic_id="890287" UNION SELECT * FROM gallery2 WHERE topic_id="1117274" UNION SELECT * FROM gallery2 WHERE topic_id="207497" UNION SELECT * FROM gallery2 WHERE topic_id="570497" UNION SELECT * FROM gallery2 WHERE topic_id="1309640" UNION SELECT * FROM gallery2 WHERE topic_id="49763" UNION SELECT * FROM gallery2 WHERE topic_id="1727087" UNION SELECT * FROM gallery2 WHERE topic_id="620968"