When Arsenal produced one of the greatest comebacks in history (VIDEO)

READING, ENGLAND - OCTOBER 30: Theo Walcott of Arsenal celebrates after scoring their sixth goal during the Capital One Cup Fourth Round match between Reading and Arsenal at Madejski Stadium on October 30, 2012 in Reading, England. (Photo by Scott Heavey/Getty Images)

Theo Walcott scored a hat-trick as Arsenal produced an incredible comeback in what was probably the most remarkable game in the history of the League Cup to win 7-5 after extra time at Reading.