The flash unit discharged twice as the water balloon was being punctured, once during the puncture and again as the water flooded the table. JoLynn took this photograph as part of a 4H-sponsored course in high-speed imaging at the Edgerton Explorit Center. She is an 8th grader at Walnut Middle School in Grand Island, Nebraska...http://www.pacsci.org/public/education/gallery/high_speed_photos/student_photos.html
