Sax growl

Continuing from my last post about sax imitation using the Db and Ab harmonicas, another quality that blues sax seems to have is that occasional sax growl (youtube it). We can do this on the harmonica too and get a similar sound. Check out the end of the video on the Gary Smith Artist Study: Minor Mambo Chorus 2. I've found that I automatically will do this now sometimes without realizing it, particularly on the 3' in 2nd position.