Anyone who's ever found himself saying: "I sure could use a small flashlight right about now"... which is... well... EVERYONE. I always carry at least a Leatherman Micra and a Fenix LD01 flashlight. They are TINY (fit into the coin pocket with room to spare) and I usually wind up pulling out one or the other a couple of times per day. I normally carry an actual knife as well though (due to NYC laws, either a Victorinox Fireman, or a Byrd Wings slipjoint), either on me, or in my briefcase, in addition to a rescue breathing protector, two pairs of sterile latex gloves, a small tube of cyanoacrylate glue, 2 large (4x4 inches) and 2 small (2x2 inches) sterile pads, 0.5 inch x 2ft roll of surgical tape and 2 meters of 7-strand 550lb parachute cord.