Quiet Walking Woman

There's this lady at work who really ticks me off. She's a quiet walker! She sneaks up behind you, silently. Which is quite odd, because she is actually a very hefty lass. But she glides around like a little fairy... shuffle shuffle... then appears beside you so suddenly you think there should be an accompanying puff of smoke. When she finally says something, the unexpected sound makes me jump up in my crappy goverment chair! She lurks! She sneaks! She tiptoes! She's probably reading this over my shoulder right now!