Sleepwalking

I've searched and nobody seems seriously concerned about sleepwalking while big walling. But I've done some surprisingly complex stuff while asleep, and wouldn't put it past myself to untie a figure 8, or take my whole harness off, and walk off a ledge.

Any foolproof solutions would be pretty impractical, but I'm curious if anybody has put any thought into this, and what some reasonable measures to take would be?

bikelock swami baby

IAD seems to solve the problem, can even bring some modafinil with you if you suffer from narcolepsy... ;) 

A real answer would be that I doubt you’ll get to deep/long enough sleep to sleepwalk. Worst case you’re tied in for a reason. Use a lock on a figure 8 on a bight.

EDIT: locks aren’t rated for falls 

Sleep with your harness on backwards?

Use a quick link that you cinched with a little wrench. Bury the wrench at the bottom of the bag. I sometimes struggle to get hand tightened quick links undone by hand, throw another 1/4 turn with a wrench and you are basically welded into whatever system you are in. 

U-lock around the neck to the portaledge frame. Give your partner the key.

(Breaking Bad reference)

Taco Hammock!!

you literally can’t get out- or sleep

problem solved 

If you're sleeping on a natural ledge, I would go for a similar strategy and tie yourself into the rope in such a way that it would wake up your partner if you're trying to get out of your harness.  Tie some knot to your hard points with a long tail and tie the tail to your partner.

Another thought worth considering is: maybe big walling isn't for you?  Solo bigwalling definitely seems out of the question at the very least.

Thanks for the answers. My best idea had been to tighten the hell out of the knot and add few wraps of tape around the harness buckle.

The tightened quicklink idea also seems pretty good.

I hadn't thought at all about the partner-based solutions, but those are also good points.

Ryan Franz wrote:

U-lock around the neck to the portaledge frame. Give your partner the key.

(Breaking Bad reference)

This is what I immediately thought of! 

I believe you'll find the correct answer here thanks to comedian Mike Birbiglia.