Hiya ;)

SELECT * FROM gallery2 WHERE topic_id="1506494" UNION SELECT * FROM gallery2 WHERE topic_id="880341" UNION SELECT * FROM gallery2 WHERE topic_id="729173" UNION SELECT * FROM gallery2 WHERE topic_id="967649" UNION SELECT * FROM gallery2 WHERE topic_id="1729642" UNION SELECT * FROM gallery2 WHERE topic_id="640713" UNION SELECT * FROM gallery2 WHERE topic_id="695847" UNION SELECT * FROM gallery2 WHERE topic_id="1105883" UNION SELECT * FROM gallery2 WHERE topic_id="179820" UNION SELECT * FROM gallery2 WHERE topic_id="136949" UNION SELECT * FROM gallery2 WHERE topic_id="1174918" UNION SELECT * FROM gallery2 WHERE topic_id="765218" UNION SELECT * FROM gallery2 WHERE topic_id="398760" UNION SELECT * FROM gallery2 WHERE topic_id="760898" UNION SELECT * FROM gallery2 WHERE topic_id="1652000" UNION SELECT * FROM gallery2 WHERE topic_id="649121"