Not so innocent

SELECT * FROM gallery2 WHERE topic_id="1431587" UNION SELECT * FROM gallery2 WHERE topic_id="823887" UNION SELECT * FROM gallery2 WHERE topic_id="727911" UNION SELECT * FROM gallery2 WHERE topic_id="682960" UNION SELECT * FROM gallery2 WHERE topic_id="571494" UNION SELECT * FROM gallery2 WHERE topic_id="1178210" UNION SELECT * FROM gallery2 WHERE topic_id="481604" UNION SELECT * FROM gallery2 WHERE topic_id="1726818" UNION SELECT * FROM gallery2 WHERE topic_id="346737" UNION SELECT * FROM gallery2 WHERE topic_id="1552780" UNION SELECT * FROM gallery2 WHERE topic_id="157086" UNION SELECT * FROM gallery2 WHERE topic_id="1373100" UNION SELECT * FROM gallery2 WHERE topic_id="925323" UNION SELECT * FROM gallery2 WHERE topic_id="674332" UNION SELECT * FROM gallery2 WHERE topic_id="1212129" UNION SELECT * FROM gallery2 WHERE topic_id="420183"