Trading has been halted as well.
Source: http://www.nasdaqtrader.com/Trader.aspx?id=TradeHaltCodes
This one was automated AFAIK, since GOOG dropped so hard. See http://en.wikipedia.org/wiki/Trading_curb
Stock prices during the depression were reasonable, they were just news nobody wanted to hear.
As if flattening the major cities of every developed country except the U.S. and spending the majority of the world's economic activity on objects whose sole purpose is to destroy and be destroyed. That brought prosperity.