Re: [NickDG] Best way to get off a wall
Take my post with a grain of salt, as you can see I'm a very inexperienced jumper, and have a long way to go before I start BASE.
That being said, I've done some climbing in the past (although not much outdoor), and am somewhat familiar with the equipment. I imagine it would be possible to carry a fanny pack with some emergency equipment for a situation like the one you describe. A few nuts or cams (cams would probably be better because of a larger range, but are heavier and bulkier), a few carabiners, and a length of cord should be sufficient.
Regular climbing rope would probably not be needed, if you are just trying to anchor yourself to the wall to await rescue. A twenty foot length of 5mm cord would probably be enough. Throw in a space blanket and a few powerbars, and you should be ok, provided your injuries are not imminently life threatening.
On the other hand, if you are looking to completely self rescue after being stranded halfway up a cliff face, you will need more equipment, much more skill, and it is definitely not something you want to do after you've been seriously injured, since you'll probably just end up killing yourself. I imagine in that situation you'd be dead before rescue arrives, though, so it might be worth the risk.
All the previous is in the event of a wall strike on an E.. For other objects, namely A and B, different equipment would be needed. I think getting hung up on a B is pretty unlikely, but I've read numerous stories of people getting hung on guy wires off an A. TO self rescue from that, you could probably get away with a few prussiks wrapped around the guy wire, so again, some relatively thin cord and a few carabiners, and you should be able to self rescue with the right training.
Mike