i know this subject has been probably debated to death, but i found this video on the Outdoor Channel.
http://www.outdoorchannel.com/Shows/BestDefense.aspx?tpid=1507124132&pid=ur_tGfbC0T9rNqX7BGsFSRbAcZjIb5Sx
http://www.outdoorchannel.com/Shows/BestDefense.aspx?tpid=1507124132&pid=ur_tGfbC0T9rNqX7BGsFSRbAcZjIb5Sx