'How can I trade on this?' Quotes from the world's trading floors

It's been a tumultuous week for traders on the floors of the world's biggest stock exchanges. Here's how they took it all in...

"You know it's really bad when you come into the office and there are pizza boxes and doughnuts strewn about,"

...said 25-year-old IG Index sales trader Will Hedden in London.

"I have butterflies in the stomach. It drove me crazy watching the market moves, they were so fickle."

A market strategist in Seoul after South Korea's Kospi index slumped almost 10% on Tuesday.

Art Cashin, floor director at UBS Securities likened the situation Monday at the New York Stock Exchange to watching a patient recovering from chest pain as he walks down the street:

"You wait as they catch their breath, and see if they can walk on. But the symptoms are concerning."

"The initial reaction with most things problematic in the market is to sell and ask questions later,"

...said an unnamed investment banker in New York

"Markets are wondering what the Fed is going to do for us. They need to think of something to sooth the animal spirits in the market."

Marc Ostwald, strategist at Monument Securities, ahead of a Federal Reserve meeting on Tuesday.

"How am I supposed to trade on this?"

An unnamed trader referring to a 50-point swing in S&P futures on Monday night.