JokesMarriage The Teacher Entered The Class. What Follows Next Will Make You Laugh Crazy. 12.4k Views When the teacher entered the class little Jonny slowly said: “Sir excuse me; your zipper is open.” So the teacher thanked him and fastened his zipper. He went near little Jonny and told him: “My dear it would better to say: the office door is open.” The next day when the teacher entered the class, unfortunately, his zipper was again open! Little Jonny loudly shouted: “Not only the office door is open but also the teacher is at the door and two small students are beside him.” See more Previous joke A Husband And Wife On A Summer Day. Next joke Two Giraffes Enter A Bar.