Parker's face lit up. "Yep!" She grinned and headed toward the ladder. "Watch this. It's all a matter of timing."

She jumped from the platform at the top of the ladder to the first beam, setting it moving. She didn't take a step for a moment, just swayed with the movement of the beam, then waited for it to move toward her, and stepped forward. The beam started to slow, and Parker waited again, then took another step, smaller this time. Another step, and the beam started to tilt.