Some students went for a school trip in the country and camped in a field near a river one afternoon. Then it began raining. It rained hard for two hours and when it stopped, there was a lot of water all over the tents. One of the students sat down on a box in his tent and began eating some cheese sandwiches. Then another student came in. The first student looked at the second student’s feet and then said to him, “Please don’t walk in this water with those dirty boots! We’re going to sleep in it tonight.”