Quick study

昨日ジョッギンの途中でどこからか金木犀の香りが漂ってきました。季節が変わるのは早いですね。さて今日紹介するジョーク（？）はどうでしょうか？
A teacher decides to end the afternoon with a pop quiz.
"Whoever answers this next question first gets to go home early," she says.
Quick as a flash, a young boy in the back of the class grabs his school backpack and hurls it out an open window.
"Who threw that?" demands the teacher.
"I did," replies the boy. "See you!"
何と頭の良い子でしょう。