SAD stands for 'Shift Alt Down' and it's the favourite keyboard shortcut for editing in Word.
Highlight your text and use this shortcut to quickly move text up (Shift Alt Up arrow) or down (Shift Alt Down arrow) in paragraphs, bulleted or numbered lists, even tables. Much quicker than cut and paste.
On the MAC try Ctrl Shift and arrow keys (not quite so easy to remember ;)
Watch this short video...