Spud (game) whose number is called both (1) gains possession of the ball; and (2) calls out 'Spud!' At that point, all of the players must freeze. If, while they were running, they were unable to stop immediately, those players must retrace their steps and return to the point that they were in contact with when Spud! was called. In no event may any of the players run around corners or hide behind trees. In all instances, they must be in sight of the player who has gained possession of the ball. At this point, the player who has the ball is
Back slang words spoken phonemically backwards. English frequently makes use of diphthongs, which is an issue for back slang since diphthongs cannot be reversed. The resulting fix slightly alters the traditional back slang. An example is "trousers" and its diphthong "ou", which is replaced with "wo" in the back slang version "reswort". Back slang is said to be used in prisons by inmates to make it harder for prison wardens to listen into prisoners' conversations and find out what they were talking about. This use of back slang was highlighted in the 9 June 2010 episode of "Crimewatch Roadshow". Back slang has