Ed McCurdy, to me, is THE definitive Worried Man song. However, I just got a new (to me) old record by The Kingston Trio, which has a version of Worried Man I'd never heard. Nothing about shackles, more about a traveling salesman wondering what his lovely wife is doing at home without him. At the end, woman is necking with one guy with another guy hiding in the closet, and hubby is just walking in the door - and all three men are "worried now, but we won't be worried long!"