(disclaimer: i'm not trying to hype, I expect it will come back down again shortly, it just seems weird to change that much that quickly)
Edit: yup.. back down to 80 20mins later.. can anyone tell what kind of volumes were traded in this period? ..I wonder if anyone was able to double a serious amount of money in 40 mins(!). Or how much money would have been needed to shift the price that much?? I suspect trading volumes are lower than normal due to mtGox being closed.. I really am having doubts that closing to let things 'cool down' is really going to work out (side: why should that even be a role for MtGox anyway?!).
Anyone have any thoughts on what will happen when it comes back online? Presumably a lot of people are only registered to trade with mtGox so have been prevented from buying/selling while the price has continued to fall.. it would seem to me we're either going to see a significant worsening of the crash or a recovery. ??