She noticed a man who came by and just sat on the bench she was using. It wasn't that big of a deal, after all he was all the way on the other side of it. Still she switched to the other leg and propped her leg up to the back of the bench and stretched forward as far as she could and held it for several seconds before moving to do the other leg again.
She then folded an arm behind her head and pulled on it with the other for a moment and then the other. She was just about to start her iPod up when she paused completely still for a second, like she'd heard something. She took a look around and then shrugged it off.