Rather than taking THREE Mad Gab cards the READER takes only TWO from the pack. The turn is played as normal. The only difference is that the team can only solve a maximum of two Mad Gabs and score 2 points.
Rather than taking THREE Mad Gab cards the READER takes FOUR Mad Gab cards from the pack. The turn is played as normal. The only difference is that the team has the opportunity to solve four Mad Gabs and score 4 points.
In essence the opposing team gets to take two turns in a row. They have a turn, at the end of which they move their playing piece accordingly. Then, rather than waiting for you to take your turn, they immediately take another THREE Mad Gab cards from the pack (putting the previous three onto the discard pile) and have a second turn. After their second turn play reverts to you as normal. The only exception to this is if the opposing team land on a "Miss A Turn" oval after their first turn. If this happens play reverts to you.
You get to take TWO normal turns one straight after the other. Add the two scores together for a possible total of 6. Remember to discard your first set of THREE Mad Gab cards and take THREE new ones before you start your second turn.