In fact, I admit to a physical reaction to that video: a pang in my guts.

CNN: Behind the Scenes: Shootings are painful reminder

Remind yourself that the physical reaction is normal, and take deep breaths, counting up and down from four.

FORBES: Do You Suffer From Workplace Anxiety?

He asked music lovers to identify passages of songs that reliably set off a physical reaction, such as tears or goose bumps.

WSJ: Why Adele's 'Someone Like You' Makes Everyone Cry

Even though almost all the images of that tiger were computer generated, the creature is fearsome enough to provoke a spontaneous physical reaction.

FORBES: 3 Tips on How to Negotiate with the Tiger

Mr. YONG: (Through translator) From physical size to reaction time to dexterity, I think table tennis is a more suitable sport for Asians.

NPR: Pingpong: A Chinese Obsession

Producers of atoms still can't beam the physical objects through space, but they can use bitspeed--digital coordination of all kinds--to bring reaction time down dramatically.

CNN: ASIANOW - TIME Asia