Step 1 : Introduction to the question "4. The referee walks up to a player and shows him a red card. What does that mean?"
...1. The player has to buy a lemonade for the referee 2. The player has to leave the field 3. The player has to be substituted 4. The player is out for 10 minutes The yellow and red cards were first used in the World Cup tournament in Mexico in 1970. They were invented by the English referee Ken Aston who suggested the cards to avoid understanding problems between referees and players. He based his idea on the traffic light system. A yellow card is a warning to stop the rough playing, a red card means that a player is sent off the field. You can't replace that player and your team has to play with 10 players after that.
