A son and his father were walking on the mountains. Suddenly, the son fell, hurts himself and screamed: "AAAhhhhhhhhhhh!!!"
To his surprise, he hears the voice repeating, somewhere on the mountain; "AAAhhhhhhhhhhh!!!"
With curious, he yelled: "Who are you?" He received the answer; Who are you?" And then he screamed to the mountain; "I admire you!" The voice answered; I admire you! Angered at the response, he screamed; Coward!" He received the answer; "Coward!"