Perhaps she was just looking for a game of Marco Polo.

There are lots of creepy things lurking in rivers— catfish, water bugs, discarded PBR cans left behind by burly fisherman—and according to one Australian woman, adolescent ghosts.
While Kim Davidson was swimming in Murphy's Hole in Queensland, a photo was snapped of her, Kim's pal Jessie Lu and three kids but when they looked back at the picture they realized another child, one who hadn't been splashing with them, was also captured.