User blog comment:Godstick/Possible new elements and mechanics in Candy Crush Saga/@comment-30095342-20131211221734/@comment-24247028-20131212015100

The candies in middle row of Level 77 are carried horizontally from left to right, though they are not linked with portals. In Level 133, however, candies at the bottom will replace the candies at the tail once they are removed.

They only have to combine the mechanism used in two different levels, so this should be technically easy. But currently the horizontal flow of candies is only seen when the rows above and below are not occupied.