Composite sequence of a girl inflating a balloon until it bursts. The images were taken with a high-speed flash system. The motion was effectively frozen in time due to the short duration of the flash (1/20,000th of a second). The balloon was filled with a few milliliters of water before it was inflated. When the balloon is popped, the gas quickly expands and cools. This cooling converts the water vapor in the balloon into suspended water droplets which can be seen as a cloud.