Sorry for the people who bugged my video earlier. Its so noisy here! The dental chair is super needy, just like your girl friend. So in a dental chair, you can see different stuff. What is missing? Remember, if there is air and water. There is no air and fire. The low speed is just like your love life, very slow. It is slow, right? The high speed is like your ex, he is fast replacing you. There is no sound yet. Then we have this equipment for spitting. If you want to spit, there must be somewhere to do that. Its like strengthening your relationship.