Two Arrows Are Not Better Than One

One arrow?  Hah!  Try six at the same time!You can actually shoot multiple arrows from a single bow, but that’s where Hollywood and reality diverge.  Robin Hood: Prince of Thieves make it seem as easy as taking the "Multi-Shot" feat from Dungeons & Dragons.  There are three main problems with this: power, accuracy and training.
A bow stores potential energy in the limbs when it is drawn by the archer.  That energy is transferred out of the limbs, through the string...