In reply to jon:
> Well if the summit was 7400m I wouldn't fall off the other side.
fair point, your googles or glasses could have fogged up to the point where you could only see your feet, it's a white out, the snow is too hard to throw snow balls etc... there is no cairn or flags at the top... and your feet are numb so you can't sense the angle.
Yeah a watch based on your axe is essential. What about a chime on it, for every metre of ascent. With a blue tooth ear piece just so you don't miss it. Special beeps for every 10, 100, 1000 increments of ascent and descent. If you get a continuous tone when in descent you know things have really gone wrong.
Post edited at 11:16