There is no strength feats. This is a link for educational purposes. Since the film makers who make movies frequent this board and would like to improve their craft, here is a site called Backyard FX. A lot of good info on making props etc. Just thought I would share.
Thanks very much BIonicSkillz - some interesting stuff in there. I like their prop focus - already inspired - now I just have to wait till spring to film agian - and edit all the stuff already in the can. Haha