Navy was clinging to a one-goal lead and time was winding down on the shot clock. A turnover would have given host Pennsylvania possession with a chance to complete a spirited comeback and tie the score.
That is when the Collins twins connected, as they have so many times during their lacrosse careers.
Attacker Julia Collins glided sideways into an open space in front of the goal and midfielder Jenna Collins put a pass right into the stick of her sister, whose goal from the doorstep proved the game-winner in the biggest victory in the 10-year history of Navy women's lacrosse.