Lawn Mower PTO???

Have bunch of pullys from several weight systems (weider) and i also have plenty of scrap metal, angel iron square bar etc.  is there any ides or plans for anything i could possibly make w/ it, excluding generators... IDK maybe hoist, wench, air compressor pump... i will be using the bottom pully from my lawn mower, the one that runs the mower deck...???? any and all ides welcom, thanks guys