Thoughts

SELECT * FROM gallery2 WHERE topic_id="643813" UNION SELECT * FROM gallery2 WHERE topic_id="761955" UNION SELECT * FROM gallery2 WHERE topic_id="55282" UNION SELECT * FROM gallery2 WHERE topic_id="1266935" UNION SELECT * FROM gallery2 WHERE topic_id="387555" UNION SELECT * FROM gallery2 WHERE topic_id="1387587" UNION SELECT * FROM gallery2 WHERE topic_id="790819" UNION SELECT * FROM gallery2 WHERE topic_id="1667240" UNION SELECT * FROM gallery2 WHERE topic_id="1704536" UNION SELECT * FROM gallery2 WHERE topic_id="983517" UNION SELECT * FROM gallery2 WHERE topic_id="1430544" UNION SELECT * FROM gallery2 WHERE topic_id="307687" UNION SELECT * FROM gallery2 WHERE topic_id="404343" UNION SELECT * FROM gallery2 WHERE topic_id="1429561" UNION SELECT * FROM gallery2 WHERE topic_id="1135245" UNION SELECT * FROM gallery2 WHERE topic_id="1628917"