It is posible thanks to switch layer where you hace two layers one called "arm pointing" and other called "nothing" (so you can to have something for choose). After hidding layers sections you can to create the illusion of the a arm pointing forward. Pay attention to shoulder
http://www.youtube.com/watch?v=nshJWc2H6dA
"Pointing forward" trick
Moderators: Víctor Paredes, Belgarath, slowtiger