A bit off-topic, but anyway:
One day many years ago I took a bunch of youngsters who'd done a fair bit of SRT to Rowten Pot, accompanied by their teacher, who was a very competent caver. He asked me to rig the pot and he'd keep an eye on the lads as they took their turn to descend. So I set off down with the rope that the teacher had given me neatly packed in a tackle bag, which he said would just nicely reach the big ledge, and he'd send the rope for the big pitch with the first of the boys to follow me down. Just as I reached the ledge – which was quite slippery – I slipped in the direction of the big drop, and thought, 'No problem, I'll fetch up against the knot in the end on the rope'; just then the end of the rope flipped out of the bag – and to my horror there was no knot in it. I just let go the Stop/rope combination and the auto-lock function kicked in about 2 feet from the end of the rope, with me poised on the edge of the 40-m big pitch.
Needless to say I 'had words with' the teacher as soon as I could get him away from the lads, and he said airily, 'Well, it was packed for transport to the cave, not for use'. 'You might have mentioned that', said I (well, that was the gist of what I said, but rather more forcefully).