Lesson 2-1-22 - High B
High B is strangely one of the tougher simple high notes.
It's made by covering just the top hole, and blowing hard into the mouthpiece.
It is definitely still possible to over-blow this note, but mostly the problem with the note is that it goes squeaky and/or ill-defined. This can be sorted by ensuring a seal of the lips around the mouthpiece, and gripping the hole tight between the left index finger and thumb behind the whistle.
Some people find this note very challenging from a breath perspective, as it requires a lot of air.