Alex and Fred:
"I'd be able to handle it even if I wasn't," she scoffed playfully. She moved a step to see if he would move a small amount with her. If she could get a straight beeline to the water so that all she had to do is grab and run into the water, she'd take the opportunity; otherwise, she would try and just edge him closer and closer to the water then one final push to finish it.
"I kinda forgot what charity this was for," She shrugged, "Most people don't do it for the charity thing." She nodded towards the water where the temporary headmaster was taking yet another dive into the water.