Substitute Teacher Gone Mute!

So... today in band, our class had a substitute teacher. We came in and there was a long message on the board. We read it, sat down, and got our instrument out. During this the sub never said a word. In fact, he never said a word the whole class time! We all figured he was mute. He used sounds a lot, and did things with his hands and wrote on the board. At first it was really hard to understand what he was saying, but then we got used to it. A few minutes before class, he got us to stop playing. It was really quiet because we learned that we needed to be to figure out what he was gonna tell us to do next. Surprising us all, he started to talk! The whole time he could, and everyone started laughing. We all learned a very good lesson from him too. And the lesson was...

Music is made from SILENCE!!!