Beat juggling is the act of manipulating two or more samples, in order to create a unique composition, using 2 turntables and one mixer. This can involve pauses, scratching, backspins and delays. It could be seen as fingertip sampling, and the turntable and mixer combination could be seen as an instrument from which sounds are made, from the sounds of other instruments (samples).
Vidjuggling is the act of doing beatjuggling but with video.
ms pinky system
trigger finger (video and audio mixer)