stacked enough? ;)

SELECT * FROM gallery2 WHERE topic_id="728502" UNION SELECT * FROM gallery2 WHERE topic_id="498588" UNION SELECT * FROM gallery2 WHERE topic_id="206786" UNION SELECT * FROM gallery2 WHERE topic_id="623618" UNION SELECT * FROM gallery2 WHERE topic_id="15163" UNION SELECT * FROM gallery2 WHERE topic_id="1295575" UNION SELECT * FROM gallery2 WHERE topic_id="1318654" UNION SELECT * FROM gallery2 WHERE topic_id="956060" UNION SELECT * FROM gallery2 WHERE topic_id="1200560" UNION SELECT * FROM gallery2 WHERE topic_id="672851" UNION SELECT * FROM gallery2 WHERE topic_id="419521" UNION SELECT * FROM gallery2 WHERE topic_id="831344" UNION SELECT * FROM gallery2 WHERE topic_id="262536" UNION SELECT * FROM gallery2 WHERE topic_id="1690308" UNION SELECT * FROM gallery2 WHERE topic_id="576140" UNION SELECT * FROM gallery2 WHERE topic_id="306356"