Everytime I play my sisters tuba I get high or something! I'm all light headed and fuzzy. And so also I practice slurs in the low tones. Every single time I get these yawn attacks. I yawn so much that I cant get enough air and I get lightheaded until I use my inhaler. Why? I exercise and this never happens, only when I play trumpet low notes. It's almost like an asthma attack, but more like a yawn attack. It's so hard to breath when playing low notes. And I not breathing correctly or do I just have weak lungs?