Been a while :)

SELECT * FROM gallery2 WHERE topic_id="994987" UNION SELECT * FROM gallery2 WHERE topic_id="791208" UNION SELECT * FROM gallery2 WHERE topic_id="972820" UNION SELECT * FROM gallery2 WHERE topic_id="375631" UNION SELECT * FROM gallery2 WHERE topic_id="142330" UNION SELECT * FROM gallery2 WHERE topic_id="651780" UNION SELECT * FROM gallery2 WHERE topic_id="1131958" UNION SELECT * FROM gallery2 WHERE topic_id="766207" UNION SELECT * FROM gallery2 WHERE topic_id="1325153" UNION SELECT * FROM gallery2 WHERE topic_id="569091" UNION SELECT * FROM gallery2 WHERE topic_id="205755" UNION SELECT * FROM gallery2 WHERE topic_id="629426" UNION SELECT * FROM gallery2 WHERE topic_id="971897" UNION SELECT * FROM gallery2 WHERE topic_id="979189" UNION SELECT * FROM gallery2 WHERE topic_id="1070786" UNION SELECT * FROM gallery2 WHERE topic_id="44496"