A brunette, a redhead, and a blonde are about to be executed by a firing squad.
The brunette is brought out first. As the commanding officer is giving the command to his squad, "READY....AIM..." the brunette takes her chance and yells "Earthquake!" The C.O. and squad get down on the ground, giving the brunette time to escape.
After seeing what happened, they decide to bring out the redhead. Once again, the C.O. yells "READY....AIM..." at which the redhead yells "tornado!" The squad runs back into the fort to get down in the lower levels. When they emerge some time later, they see the redhead is long gone. Not giving up hope, they bring out the blonde. Again, the squad is given the command "READY...AIM..."
The blonde, learning from the other two, at that point yelled "FIRE!"