I had a dream where many things happened in a series of public places. A funny thing was that everytime I looked at a clock it was about the same time, always a little before 1PM. One clock said it was 12:59, almost time to go back to work. Then I'd go somewhere else, and the clock said it was 12:55. Then the next clock had moved forward again, but only by a couple of minutes.
Maybe I've been watching Heroes on TV too much, wishing I could stop time like Hiro Nakomura. Then again, dreams are simply different from reality. Maybe whatever scripts my dreams had all this ground to cover in the setting of a lunch break that I don't have any more as a volunteer. So the only way to fit it all together was to have time be unrealistic. Not a problem for a dream.
Actually I don't think being unrealistic is difficult for any of us to be in real life, too. It's just that in real life the clocks keep time moving, unless they're broken. If we don't give up on external reality teaching us, we can't get too lost in fantasy. Still it's amazing how beliefs can defend people against reality being contrary to those beliefs. I'm sure that reality wins in the end.
So for me stopping time is only for my dreams or a show with really good character development. As a military tactic around Jericho? No, I don't think so. Such a thing happens in dreams and fantasy, not reality.
(For anyone interested in a long fantasy about how NASA confirmed the lost day of Joshua, and a thorough discussion debunking it, that's here: http://www.snopes.com/religion/lostday.htm)