I can't tell if she's celebrating (Goal!) or in the process of falling down. It looks like her left ankle is turned in and she's losing her balance. Also, if you're going to strip in public, you should at least be attractive. No one wants to see an ugly person get naked...
i wonder what happened just after this picture was took? maybe some guy ran up to her and pumped in it so quickly that he cummed in 2.6 seconds then ran off? or maybe she just pulled her knickers up and carried on with her business.