Mr. Chairman, we agreed in the past that when someone raises a point of order, the clock would stop, so that the member would not lose out on any time. If the clock isn't stopped, there will be a flurry of points of order calling for clarifications, rulings or comments. By stopping the clock, you can hear what is being said and rule that it is not in fact a point of order.
On May 13th, 2008. See this statement in context.