 To create the illusion that the characters had their hands at their  sides, the producers had to make each character look downward. This  caused the player models gun to point downward, while keeping the  head facing upward. This bug in Halo 1 was fixed in the sequel, but  a feature was added that players could lower their guns slightly so  that for use in machinima so that it did not look like the  characters were preparing to shoot each other. Although they used  pistols again in a PSA video, the RvB team generally gave their  characters SMGs in Halo 2.