Electric Cross Bow

http://www.google.co.za/search?sourceid=chrome&ie=UTF-8&q=electric+crossbow+youtugbe

http://www.youtube.com/watch?v=BSjCY2kGyfI

http://www.youtube.com/watch?v=0R9u2gjbw1w&feature=related

http://www.youtube.com/watch?v=xLMd_B5bJU8&feature=related