If you're watching the FIFA World Cup this year, you may have seen a free kick where the referee took out a spray can and proceeded to draw a line on the grass in front of the players.
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World Cup: What Is That Foaming Spray Used by Refs?
If you're watching the FIFA World Cup this year, you may have seen a free kick where the referee took out a spray can and proceeded to draw a line on the grass in front of the players.
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