If you think the competition in a regular NFL season is crazy, wait until you see the craziness that happens before the games begins. Check out some of the most extreme tailgating parties in the US.
Die-hard Ravens fans pose at a tailgate party outside of M&T Bank Stadium in Baltimore.
Fans tailgate before the Arizona Cardinals and 49ers game at Candlestick Park in San Francisco.
A few of the 'Browns Backers' set up their tent in the parking lot of Cleveland Browns Stadium in Ohio.
Indianapolis Colts fans tailgate in the parking lot outside of Lucas Oil Stadium in Indianapolis, site of the 2012 Super Bowl.
A DirecTV satellite is set up at a Minnesota Vikings tailgate party outside of the Metrodome in Minneapolis.
Bengals fans set up shop in the parking lot of Paul Brown Stadium in Cincinnati.
Fans erect a teepee at this tailgate party outside of Arrowhead Stadium, home of the Kansas City Chiefs.
Inflatable figures of Green Bay Packers players “wait” for the big game in the parking lot outside of historic Lambeau Field in Green Bay, WI.
Some fans take tailgating to a whole new level, including this Cincinnati Bengals fan outside of Paul Brown Stadium.
These Indianapolis Colts fans even go as far as setting up their own personal bar in the parking lot. Can you say extreme tailgater?
A Philadelphia Eagles fan shows off his customized car, equipped with 2 beer taps on the hood, in front of Lincoln Financial Field in Philadelphia.
Tailgaters roast a pig in the parking lot of the O.co (formerly Overstock.com) Coliseum, home of the Oakland Raiders.
This Packers fan and his "best friend" set up their trailer and tent in the parking lot of Lambeau Field in Green Bay, WI.
New York Giants fans -- donned in blue, red and white -- brave extreme elements to get pumped up before a football game.
It’s a family affair in Dallas! Fans relax, socialize and grab a bite to hit before watching the Cowboys hit the field running.