DJ Short-e teaches you how to do the Chirp scratch. Named because it sounds like a bird chirping away, this scratch is attained by playing the sample forwards and cutting the end of the sample off, then bringing the record back and turning the fader on. Repeat.
You probably heard DJ Premier use this scratch loads and it can be really funky. Although relatively simple you can achieve much with this scratch, combining it with flares for the chirp flare.