Snakes in the Bell

Last night at the jam my horn was making notes that were completely out of whack. I raced over to try tuning to the keyboard but I was still out of whack with the other players. Each time I made a note it was like five snakes jumping out of the bell! Horrified, I jumped back from the microphone. I nearly died of embarrassment because I loathe bad intonation, and bad tone curls my teeth and straightens my hair! The problem seemed to be a leak.