Use your head!

Sometimes when you're in the thick of all of the excitement you don't think as clearly as you should. I know in most sports, your coach constantly tells you that 95% of losses aren't from you not being capable or your opponent being better than you, but smarter. Whether its not paying attention and losing your team 10 yards from a penalty, or missing a block cause you're staring at a cheerleader, mental mistakes can definately cost the game. Above is a video of a very funny case when a player get confused and tackles his own teammate. Way to go! Videos can be found all over the viral video world of mistakes like this that cost the game.