The Reverse 441 is a variation of the 441 (or Half-Box as I, probably in vain, try to call it) in which the vertical throws are made toward the center of your body, instead of toward the the side. This makes for a slightly more cramped and therefore more difficult pattern, though the trick itself is still very basic. The Reverse 441 is so similar to the regular 441 (Half-Box) that a separate tutorial is not necessary. Once you have learned the base pattern, the reversed variation should come naturally. If for some reason it does not, you can simply follow the tutorial for the regular 441 and flip the direction of all vertical throws.