Fans particularly went all out in New Orleans, packing the Superdome with more people in costume than in any indoor venue ever.
In Dallas, however, the scene was far less positive. Cowboys faithful wore the infamous paper bag mask and hoisted up all sorts of signs comparing the haunting 2010 season to Halloween.
Elsewhere around the league, people dressed in all sorts of scary or strange get-ups — making it look like an average Sunday at the Oakland Coliseum.
Click here to see some of the best fans had to offer on the NFL’s Halloween Sunday >>
