How The Yellow First Down Line Works On TV During Football Games

 

Fast forward to 1:55 unless you don't understand the rules of football. If you don't understand the rules to football I suggest going to bars more and conversing with the general public. Anyways I figured I'd post this video because of I have always wondered how that yellow line stays there. Even when a player walks over it the line doesn't move. Pretty incredible stuff. To be honest I never thought nose ring would be teaching me such a thing but I appreciate it. 

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