Interesting home made AG

Never saw this, but maybe others have. Pics, video, story behind it.
http://images.google.com/imgres?imgurl=http://www.airgundevelopment.com/custombuild/schaefer/target5.JPG&imgrefurl=http://www.airgundevelopment.com/custombuild/schaefer.html&usg=__NKwFLkbT9uJlhHjEBkJGpL_l79Q=&h=382&w=406&sz=23&hl=en&start=67&sig2=5W1x3k_9pzGzbZqJaqYgzg&um=1&tbnid=CweS_JZb4q3sDM:&tbnh=117&tbnw=124&prev=/images%3Fq%3Dairgun%2Bbenchrest%2Btarget%2Bshooting%26ndsp%3D18%26hl%3Den%26rls%3Dgm%26sourceid%3Dgmail%26sa%3DN%26start%3D54%26um%3D1&ei=Owu7SoalDYbatAP1n-CNCQ