英语笑话:I didn't know that I was so far 想不到已经跑了这么远

I didn't know that I was so far
　　A big battle was going on during the First World War．Guns were firing， and shells and bullets were flying about everywhere．After an hour of this， one of the soldiers decidedthat the fighting was getting too dangerous for him， so he leftthe front line and began to go away from the battle． After hehad walked for an hour，he saw an officer coming towardshim． The officer stopped him and said，“ where are you going？”
　　“I'm trying to get as far away as possible from the battlethat's going on behind us， sir，” the soldier answered．
　　“Do you know who I am？” the officer said to him angrily．“I'm your commanding officer．”
　　The soldier was very surprised when he heard this and said，“My God，I didn't know that I was so far back already！”