So:
Based on the replies, I need now to audit my wardrobe for a faulty fastner and pair of hiking boots that might fail at a moments notice. Having completed that task, I then need to conduct a thorough check of my aresenal to ensure that none of my weapons are missing a safety catch?
Actually, the thought of having a sweater with a 'zip fastner' is almost as shocking as the thought that I might own a dodgy .45 (we have 9mm, sadly, in the metric half of the globe).
And anyway, isn't a sweater that opens and closes a cardigan?
I am greatly reassured. Well, sort of.
JH
PS - I might add somewhat weakly that the 'piece of timing chain' concept was not mine; nevertheless I accept responsiblity for the least useful post of 2007 to date.