The man above is Manfred Hoeberl, a former fixture in the World's Strongest Man competitions they periodically rerun on ESPN2. He was—is?—very, very strong. But he doesn't use your silly, wasteful, boring means to test his strength. Nope. He uses grippers. They're affordable. And certified! Josh Levin explains, on this week's excerpt from Slate's Hang Up and Listen podcast.