Hi, Phil - I like that story - I just can't visualise myself coping with the pepper spray. However, watching the youtube video - I found myself surfing on to this one
http://www.youtube.com/watch?v=hLS20pWMs6Q
Clocky! This idea is, naturally, about 40 years too late for me (once I wake up, I can't get back to sleep these days) but as a youngster, it would have saved my bacon on many an occasion.
I know one or two nephews and nieces who could use this right now!
Best
Margaret