Rules to play Foosball
Once a match has begun, no player may practice either his serve or shot on either the table being played or on any other table. This rule applies during time outs and between games.
Practice is defined as either moving the ball (by contacting it with a player figure) or practicing the serve.
Illegal Practice is a judgement call by th official present at the table. Inadvertent movement of th ball does not necessarily constitute Practice.
Penalty for this infraction is a technical foul, except in the case of putting the ball back into play following a time out.