I must say last week I was in your guy's shoes, but now that I have funds in my MtGox account, 24/7 trading is amazing.
Wanna do a 1:1 trade tonight and next week I'll pay you 15% more? (for MtGox currency that is)
Btw, I think the guy who made the massive sell is freaking retarded, it was just 30 two or three days ago, and it'll be that high again some day soon, possibly Monday, but I don't see it rocketing that high.... (not an economist by any means though)