 The last time Jim Carrey and Joel  Schumacher worked together was in "Batman Forever." In that film,  Carreys character (the Riddler) also showed an obsession for  numbers, which he used to represent letters of the alphabet in his  riddles. The numbers were 1, 8, and 5. Batman figured out that 1 and  8 were meant to be 18. 18 + 5 = 23. The number 23 is a W, and in  "Batman Forever" there is a scene of Carrey underneath a W (the gate  outside Wayne Manor). 