while i thought only atomic bomb explosion can have such dynamic, it happens Groupon valuation too: from http://www.bloomberg.com/news/2011-03-17/groupon-is-sa

while i thought only atomic bomb explosion can have such dynamic, it happens Groupon valuation too: from http://www.bloomberg.com/news/2011-03-17/groupon-is-said-to-discuss-ipo-valuation-of-up-to-25-billion.html http://www.bloomberg.com/news/2011-03-17/groupon-is-said-to-... : Groupon Inc. has held talks with banks about an initial public offering that would value the online-coupon company at as much as $25 billion ... Groupon was valued at about $1.3 billion last April, when it raised $135 million from investors, including Digital Sky Technologies. It contemplated more funding at a $3 billion valuation in November, shortly before Google’s offer. An investment of $950 million, completed in January, pegged Groupon’s worth at $4.75 billion.