Mystery Solved: the yellow first down line
Thursday, September 18th, 2008
First down, no yellow feet
If you watch football on TV, you’re familiar with the first down line that appears on the field as the players are running around. It’s usually a bright yellow line that moves with each play, and it’s pretty obvious that it’s not really on the field but is superimposed for TV broadcast. I figured it was just some simple overlay done in the TV studio. Then one day, I happened to stop on a game while flipping through the channels and noticed that when a player walked across the line, his feet didn’t turn yellow. In fact, the line never once encroached on any solid item that crossed it.
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