well, i took a long loop of paracord; put my keys on it and a 6 oz. brass lock as well. when i don't want to be noticed i let the lock slide down and join the keys. otherwise i can just let the lock slide down the end of the loop and it's ready to swing or snap. i have just enough length that i can do a simple choke, especially if i pull tight against my boney forearm (like triangle choke). won't work though if you don't want metal, although most won't notice the lock if you keep it next to the keys. my excuse is it's for my locker at the Y for swimming laps (better than nothing). i imagine that you could use some of the monofilament for fishing (the shark-catching-size stuff!)- how about looping it through small round hard pvc balls with a hole drilled through their centers? it would be almost a bolo type weapon except a bit shorter. imagine whipping that, even with one hand, around a bad guys neck. if it manages to wrap even once he's gonna react and react fast! and hardly anyone goes to pull something off their throat with only one hand, so...advantage goes to you. as far as metal goes, get one of those thin teethy saws that they use for emergency cutting. my friend from the Airborne had one- he says that the C.O.s watched those things like they were guns! a lot of the guys wanted to take them out with them! well, there are options for everything. oooooh, Ally McBeal's on, gotta go!