Improvise her bottoms

There was a small collection of trees separating the running track from the road outside; the design was intended to shield the park from the sound of traffic, but to Jamie she saw it only as a shield for her modesty. Ignoring the woman who had confronted her, Jamie made a beeline for the trees with her hands still covering her crotch. As soon as she reached the nearest one she jumped behind it and pressed her back against the bark.

"What the hell?" she swore as she removed her hands and looked down at herself to confirm that, yes, she was naked from the waist down. "How the hell did I not notice this?!"

She briefly considered her options. She eyed the leaves in the trees overhead, but since it was summer there weren't any on the ground, meaning she couldn't really reach them. She doubted she could make clothing out of them anyway. That left running home like this, or...

"Clothing is clothing." she muttered to herself.

She reached for the hem of her t-shirt and lifted it up over her head, revealing (or so she thought) her sports bra to the world. But whatever mind fart had caused her to forget her bottoms in the first place had also forgotten the bra. Somehow Jamie did not realise this as she casually removed her only item of clothing that was not shoes or socks.

"Okay, now... how do I turn this top into a bottom?" she asked.