It's time for new episode of our highly anticipated "under the bridge" series. Today it's Katja, for the very first time. She decided for a bridge over a floodplain area. And because it's summer, there was no flood and she was able to pop 2 balloons under different arches, to check if the loudness would be different. The first one is a blow-to-pop and the second gets popped by her fingernails.