I posted this on the EDC site, but will mention it here... a bandana rather than a handkerchief large enough to use as a bandage... a small zip loc bag to use as an occlusive dressing to help seal a chest penetration... a good pocket size LED flashlight... a cell phone with good standby time and GPS... an AM/FM radio or app for phone that gives good situational awareness for events outside your immediate area would be valuable for emergency situations like this event...if you don't speak the language, a couple of flash cards with the native language on one side, and Romanized to English on the other... "take me to the hospital... police station... American Consulate".. and a picture of Ben Franklin for their service