From the rulebook: You and your opponents each move two pawns around the gameboard along the path of colored doors. When you land on a colored door assigned to an opponent, challenge that player to answer a Knock Knock joke. If the challenged player knows the answer to the Knock Knock joke, you are penalized ...your turn is over and your pawn does not advance; if the challenged player does not know the answer to the Knock Knock joke, he or she is penalized and must move a pawn backward along the path and you win another spin. As you can see, if you can answer a Knock Knock joke by knowing "Who's There", you have a good chance of staying in the lead. Be the first player to bring both your pawns home and you'll win the game.