ive jibbed alot of random shit, we just went walking in a ravine and neighbourhood and found so much shit people dumped. old kegs, truck bed, old deep freezer, bent to shit pvc pipe(took it home it was so fun), knocked over street sign, light pole waiting to be put up, chain link fence stall.
theres actully so much things to jib, you just need to keep your eyes open and be creative.