"Human Error" in high-frequency trading temporarily causes AAPL to plummet 9.4%

there is no way this is an accident.

from the article:

As it happens, the Wall Street Journal reported earlier in the day that the Securities Exchange Commission was investigating the high-frequency exchanges -- including BATS -- as part of a broader probe into whether the new trading platforms are using their high-speed links to the major stock exchanges to gain an unfair advantage.