My hiking partner once asked me about bear deterrent, and what/if we should have something. I told him not to worry, I had it under control. He asked what my plan was that made me so confident. I told him I was carrying a gun. He thought for a sec and "what kind?" I told him it was a ,22 pistol. Really small and light. He laughed and told me a ,22 would never kill a bear. I said "No, but when I shoot you in the leg with it, I will easily be able to outrun you." The look on his face was priceless.
And now when we go hiking together, he carries that big heavy can of bear spray that he bought.