Mac left her morning class and ran into Dick.
Literally, ran into him. That's the danger of having long hair, when it falls into your face because you didn't give yourself enough time to pull your hair back that morning. It blew into her face and she collided with her boyfriend.
Dick just grinned at her, that happy-go-lucky grin that she knew hid a lot, and put his hand on the small of her back and steered her to the duck pond on campus that they ate lunch at sometimes.
Somehow, Dick had managed to get swan shaped pedal boats into the water.