One more useful expressive technique is the fall-off. This involves a very fast slurred chromatic run trailing off away from the note you have played. The fall off may go down or up from a note and although it has a definite starting point, it has no definite finishing point.
Fall-offs are usually short and can be indicated by a diagonal wavy line moving downwards or upwards away from the original note. It may take some time to develop the ability to use fall-offs. Start by playing short slurred chromatic runs and gradually speed them up. Once again, listen to the CD to hear the effect of the fall-off.
Here are some musical examples which make use of fall-offs. As with other techniques, try incorporating fall-offs into phrases you already know well and then using them in your improvising.