I believe the original show (mythbusters) set out to disprove that Howard Hill actually did not split an arrow from End to End with another arrow in the movie Robin Hood filmed in 1938. They did use a shooting machine in the original airing of the show mythbusters and used a recurve, then a compound I believe. However, as people here and Byron Ferguson have pointed out there were flaws in their test and people were probably misinformed.

Byron seems to want to set the record straight and make an attempt to replicate Howard Hill's original shot.