One of my students, Katja, have made a soundtrigger to catch these pictures when they are moving and hitting the wall.In her garage, she constructed a little studio. A flat surface, which is not placed horizontally, serves as a glider for a skateboard on which five glasses are glued. The correct distance is calculated for the startingpoint of the skateboard.When the board hit the wall, the microphone picks up the sound and that triggers the camera. By using backlighting, Katja creates a black border and the transparency of the glass. A nice touch, she uses food colouring chemicals for the effect in the glasses. Here you can find how you can make a soundtrigger. Have fun!