The Differential Theory of US Armed Forces (Snake Model) upon encountering a snake in the Area of Operations or A Diversified Approach to Military Operations:
Infantry: Snake smells them, leaves area.
Airborne: Lands on and kills the snake.
Armor: Runs over snake, laughs, and looks for more snakes.
Aviation: Has Global Positioning Satellite coordinates to snake. Can't find snake. Returns to base for refuel, crew rest and manicures.
Ranger: Plays with snake, then eats it.