Two years after his fourth-quarter mistake against Oregon State cost California a shot at becoming the top-ranked team in the nation, Kevin Riley can't escape the images of his blunder.  At least now the Golden Bears senior quarterback can laugh about it.  Riley, who has No. 23 Cal back in the Top 25 after a six-week absence, chuckled when remembering the play that ended the Golden Bears' dreams of national recognition and made him a constant feature on highlight shows. &nb...