private static FU_MAX_LEVEL = FU.VERY_VERY_VERY_MUCH;
private static FU_LEVEL_REACHED = null;

public static FuLevel fu() {
   if( FU_MAX_LEVEL == FU_LEVEL_REACHED )
       return FUMath.getFU();
   return FU_LEVEL_REACHED = ( FUMath.pow( FUMath.pow( FUMath.getFU(), FUMath.INFINITY ), fu() ) );
}