Ahh, the much maligned fanny pack. I have a few and in fact for the last couple of seasons I have used the Mother Of All Fanny Packs, the Mountainsmith Day Lumbar Pack as my EDC and day hiking bag.

For myself, YMMV, I have gotten tired of fanny packs bouncing on me when I run. I do not know if the item above will do the same on my leg or hold tight. But I was intrigued by the theme of the thread and I constantly attempt to mate military gear to non-offensive civilian applications.