  succinctness here goes: today i'm playing a game in which you kick a round ball along on a grass patch. this grass patch has a foundation layer of brown substance called soil, upon which green blades (among other types of contraptions that are collectively known as the artificial environment) called "grass" sprout like green blades called grass (which grow at identical rates as green blades called grass).
the idea of the game is to run over the grass blades over and over again with expensive shoes that have little projections for the supposed function of gripping the soil better. the shoes are called "the official footwear of this game in which you kick a round ball along a grass patch blah blah blah". in the event of a participant or player not playing within the rules of the game or causing irreparable harm to another player physically, mentally or otherwise, the referee may give him a caution or dismiss him from the game completely. a second caution issued during the game will also render a dismissal. there is no such thing as a third (or fourth, or sixty-fifth) caution, presumably because cautions have no effect on a player when he is fuming at any place beyond the field. the referee usually makes known his intention to caution a player by flashing a thin piece of yellow paper or plastic known to idiots who watch too much of the game in which you kick a round ball along a grass patch blah blah blah on tv as "yellow card".
to signal a dismissal, the referee displays a similar thin piece in red and an appropriate gesture with his fingers such as to prevent trouble with the authorities, physical harm from the player to be dismissed, or his immediate self-destruction from eternal guilt. the player must then walk away with an expression similar to that of a person being run over by a train three times over... n.b. : every time i do this it rains. i believe i have a remedy for drought in my hands. 
