In reply to Dandelion:
> I thought I'd post a note about this, since though the risk is obvious in retrospect I wasn't careful enough to stop it happening and no doubt there must be a few other mugs about.
>
> Yesterday I was belaying a friend on lead at the indoor wall. He'd taken the rope out of a rope-bag, seemingly tidy and in good order, so he hadn't flaked it out. Climbed up, all OK - but as I lowered him off the rope was tangled on the ground near me. It jammed in my belay device and drew my hand towards it, trapping the sking between thumb and fingers. I yelped repeatedly and two members of staff kindly came over and sorted it out for me. No major harm done but it hurt and was very scary - I was v glad it hadn't happened outdoors.
>
> Lesson: even if the rope looks OK and has been used recently you MUST flake it out. Obvious, I know.
Tangles or kinks can happen even if the rope is flaked. I'd say that your error was not being well enough in control to stop before your hand hit the belay device.