RE: Are we heading for $ 30 silver?Have a look at the trading for Jan. 28, 2011.
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Perhaps others have a better source for looking at expired contracts, but I use:
admis.com/quotescharts.aspx
Get the chart for silver, then substitute the month and year that you want in the hyperlink, for example you can change the SIN11 to SIG11 for Feb 2011 Silver. Holding your cursor over each date gives you the range for that day.
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IIRC, it hit 26.40 that day
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To see what a bubble looks like, check out the chart for CLZ08 and the 2 before it so that you can see the high in July, CLX08 and CLV08. Come to think of it, this situation may be analogous.