The guards walk by and ask the Brit "How high can you jump?"

The Brit says, "2 meters." The guards give him two pieces of bread.

The guards ask the Italian, "How high can you jump?"

The Italian says, "3 meters." The guards give him three pieces of bread.

The guards then ask the Irishman, "How high can you jump?"

The Irishman figures he wants more bread than the others got, so he says, "5 meters!" The one guard yells to the other, "SHOOT HIM! He can jump over the fence!!"