Here is the earlier Durden's post referred to:
http://www.zerohedge.com/article/last-minute-after-hours-dump-leaves-investors-edge-ahead-dual-pomo-bail-out-monday
This helps explain a little bit this last explosive one.
My reading of the list of acronyms:
HFT = High Frequency Trading
arb = index arbitrage
VIX = stock volitility index
ES = e-mini S&P 500
GC = gold futures
GCZ is December gold
ZB = T-Bonds futures