They were about to be executed when the USC grad remembered that Iraqis were afraid of natural disasters. Right before they were about to shoot him, he yelled, 'Earthquake!' The Iraqis ran and the the USC grad escaped.
Later, when the UNC grad was about to be executed, he remembered what the USC grad had done, and he yelled, 'Flood!' All the Iraqis ran and the UNC grad escaped.
The Clemson grad realized what the two had done and planned to do the same. When the time came for his execution, he confidently yelled, 'Fire!'
