How to do a few things with trombone

Yesterday, I had my first trombone lesson in Duxford. Within half an hour, I learned quite a few things:

1. How to blow a raspberry.
2. How to blow a raspberry into a mouthpiece.
3. How to assemble the trombone.
4. How to hold the trombone.
5. How to blow a raspberry into a mouthpiece when it is attached to the trombone. (The sound produced, I was told, is B♭. “Your family will love it.”)
6. How to disassemble the trombone.

Armed with all this knowledge, I practiced a little today when there was nobody around.