What Stock Was Up 225% Yesterday, Traded as High as 200,000

When doing research on percentage gainers for yesterday, I came across the stock symbol ZAZZT. When I went to Yahoo Finance to look for details on the stock, no company name was listed, it showed that the stock closed at 10.75 the previous day, and closed at 35.00 on Thursday, an increase of 225%. It also showed that the stock traded between 10 and 200,000 yesterday. So what the heck kind of a stock is this? After doing a lot of searching, I found that ZAZZT is a NASDAQ test symbol for IPO's.