Pa is something of a braggart. Fortunately, he's the "modest" kind of braggart--if you understand what I mean.
"One story was how he had developed his arm and shoulder muscles. He said he would stand outside behind the house and, with a 5 pound potato sack in each hand, extend his arms straight out to his sides and hold them there as long as he could.
"After a while he tried 10 pound potato sacks, then 50 pound potato sacks and finally he got to where he could lift a 100 pound potato sack in each hand and hold his arms straight out for more than a full minute!
"Next, he actually started putting 'taters in the sacks ..."