'In first position this instrument's slide is fully retracted; in 7th position, fully extended'
trombone
IT'S GONNA BLOW!: In first position this instruments slide is fully retracted; in 7th position, fully extended
In first position this instrument's slide is fully retracted; in 7th position, fully extended
In first position this instrument's slide is fully retracted; in 7th position, fully extended
IT'S GONNA BLOW!
trombone
IT'S GONNA BLOW!