Flash Crash

Not as exciting as other long-winded flash crashes, but we got one today.  Just a news-driven push lower and instant rebound.  What I find astounding, is that the market could whoosh lower 15 points in just over 5 minutes and not even print a -1000 TICK reading.  That's just "impossible" and reflects structural deficiencies.  Not a good thing for the really big-sized trader.