Newton's Third Law: The Space Edition

The perfect demonstration of Newton's Third Law in space - "For every action, there is an equal and opposite reaction." One astronaut fires a gun, and suddenly becomes a human rocket propelled in the opposite direction! Physics doesn't care about your space walk plans. No atmosphere, no friction, just pure conservation of momentum sending you on a one-way trip to the cosmic void. That's why NASA doesn't issue firearms with the standard equipment package. Next time someone asks "what practical applications does physics have?" just show them this cautionary tale of space ballistics gone wrong.