Unexpected display: a gymnast's unwitting exposure under the sun

Under the blazing sun, a 19-year-old Dutch girl gymnast sat, her long blonde hair tied in a high ponytail with a bow, her plaid mini skirt hitched up slightly due to the strain of her pose. Sweat trickled down her forehead, contrasting starkly with the crisp pleats of her school uniform. Her cropped shirt revealed a hint of her underboob. Unexpectedly, an object was visible, half-concealed by the giant Coke can she sat upon, her anus stretched to cover half its surface, revealing covered erect nipples.