If you can score tickets using little more than a whistle and clipboard then what can one accomplish using a handkerchief and a pocket knife? Quite a lot, as you would imagine. As this StoryCorp story shows, the pair can be used to help heal strife in an organization.
A small word of warning: while I do carry both a knife and handkerchief with me pretty much at all times, I also use said hanky for blowing my nose. Which means that you most definitely don't want to eat anything that I've touched with it (listen to the story and that last comment will make a lot more sense).
Also on this recording, a touching and challenging story of sibling love.