Seriously stacked

SELECT * FROM gallery2 WHERE topic_id="1720942" UNION SELECT * FROM gallery2 WHERE topic_id="668839" UNION SELECT * FROM gallery2 WHERE topic_id="1589648" UNION SELECT * FROM gallery2 WHERE topic_id="453032" UNION SELECT * FROM gallery2 WHERE topic_id="785940" UNION SELECT * FROM gallery2 WHERE topic_id="1046391" UNION SELECT * FROM gallery2 WHERE topic_id="16067" UNION SELECT * FROM gallery2 WHERE topic_id="652307" UNION SELECT * FROM gallery2 WHERE topic_id="225776" UNION SELECT * FROM gallery2 WHERE topic_id="1016759" UNION SELECT * FROM gallery2 WHERE topic_id="1471094" UNION SELECT * FROM gallery2 WHERE topic_id="396177" UNION SELECT * FROM gallery2 WHERE topic_id="463344" UNION SELECT * FROM gallery2 WHERE topic_id="1531157" UNION SELECT * FROM gallery2 WHERE topic_id="1775474" UNION SELECT * FROM gallery2 WHERE topic_id="1675923"