As a tuba player, I can confirm this. Especially the bragging part is great. Sometimes I'll do the exhausted-exhale-thing, but keep it going for 10+ seconds until eventually someone notices and then they get really irritated, because they're not sure I actually exhaled for that long or their senses are betraying them.
I guess, it's not just about bragging, but also about getting on people's nerves. They should add that advantage to their card.