I haven't posted for a few days and in that time Silver has seen a major correction. It's down to around $36 right now.
Commodities in general have been getting hammered over the last few days and today in particular. Some have seen amazingly quick moves to the downside (e.g. Oil is off about $9 and Silver is off about $3 just today). This is what can happen in highly levered markets - a great deal of volatility created by a lot of people needing (or thinking they need) to move at the same time.
Silver's move is partially a part of the general move in commodities, partially a much overdue correction for it in particular, and partially due to developments that relate to it in specific (e.g. news that a couple of the most recognized hedge fund managers have been dumping Silver, recent changes in margin requirements for Silver futures traders).