I was once half way through a wedding using a borrowed JVC500 and the viewfinder packed up as they made their vows, I could not reach the spare camera which was packed neatly in a nearby camera bag. I could feel the sweat running from my forehead and back as the stress levels went through the roof, my life flashing before me as i begged god to turn back time. All I could do was pull back and take the wide shot and hope, anyway it was just the viewfinder and I got away with it.