(6)
The room around you erupts into laughter. You realise you've said something silly. Playing Tuba, in the words of Eddie Izzard, is a punishment; it simply isn't something one chooses to do. At any rate, Mr Porpoise explains that they have just given the only available tuba to some fat kid. Sorry.
When you get to school the next day you find your name is down on the list for trumpet lessons.