This television episode is referred to by:
November 7, 2011
Marshall and Lily make a deal with Barney about the Ducky Tie. The agree that if Barney wants to stop wearing the Ducky Tie, Marshall will be granted three additional slaps. They recall all the previous slaps, from the original Slap Bet. Slap number four is delievered in the episode 'Slapsgiving 2: The Revenge of the Slap'.