In my former career, I always, always had a simple, single bladed penknife in my pocket to scrape bark to see if a branch was alive. It was Swiss Army--kept if from the days I used to propogate poinsettias by the thousands. Always had it in my pocket, no matter where I was (except when I wore a dress).
Years ago had to removed it when I was doing research at our local county court house, and the court officers gave me stern looks going through security. I never put it back, but keep it in a drawer. Ya never know when you might have a penknife emergency around the house...
Now considered a deadly weapon.
