I couldn't give you a definite answer really, but it may be combination of a short note value followed by a longer one, a sharp ADSR envelope (to a lesser degree), or use of syncopation (accenting a note that usually is not accented). Rule of thumb, if you're curious about some kind of sound design, along with asking someone who knows what he's doing (which is not me), do experiment. Sound design is a very hands-on activity.
-Annie