I get some use out of my knife, so it is easier to carry it with me. [His knife is also knocking around in his hat. Folded, of course. One wouldn't want an open blade that close to the scalp.] You would be surprised at the amount of things I can fit into this hat, see.

[Screwdrivers, pens, personal lubricant... You never know what you'll need!]

[In any case, he's finished, so he tucks the whetstone away and (after a moment of focus) gives the dart a throw. Will he pop any balloons? Probably, but who knows!!]