On Purim, Jews read the Megillah, or the Book of Esther. It is customary to make noise every time the name of the villain, Haman, is read, to drown him out. Children use noisemakers called graggers, and adults boo and stomp their feet.
Israeli soldiers, however, have a variety of other implements at their disposal. Here we have a unit listening to the Megillah at a shooting range, and firing machine gun volleys whenever Haman is mentioned.