Waiting for their turn

SELECT * FROM gallery2 WHERE topic_id="1275909" UNION SELECT * FROM gallery2 WHERE topic_id="1797759" UNION SELECT * FROM gallery2 WHERE topic_id="797061" UNION SELECT * FROM gallery2 WHERE topic_id="1756651" UNION SELECT * FROM gallery2 WHERE topic_id="18138" UNION SELECT * FROM gallery2 WHERE topic_id="1540055" UNION SELECT * FROM gallery2 WHERE topic_id="1605161" UNION SELECT * FROM gallery2 WHERE topic_id="1301124" UNION SELECT * FROM gallery2 WHERE topic_id="827435" UNION SELECT * FROM gallery2 WHERE topic_id="1473781" UNION SELECT * FROM gallery2 WHERE topic_id="414676" UNION SELECT * FROM gallery2 WHERE topic_id="1555478" UNION SELECT * FROM gallery2 WHERE topic_id="1803018" UNION SELECT * FROM gallery2 WHERE topic_id="1619126" UNION SELECT * FROM gallery2 WHERE topic_id="1156868" UNION SELECT * FROM gallery2 WHERE topic_id="1783312"