Tenth of a blink

Suddenly, without warning, Visser Three whipped his tail at me. A dangerous, foot-long, scythe-shaped blade arced toward me at a speed no human could hope to evade.

But I wasn't just a human. In a tenth of the time it took to blink, I had seen the sudden motion and I was crouched down, ears back, teeth bared. My paw, claws out stretched, swiped at the tail blade.