I wouldn't really call a 400sat move over a few minutes "driving the price down", especially when there's almost no volume to speak of on either side, but it's definitely lighter on the buy-side .  Unless you are talking about a different exchange from Mintpal - in which case I'll shut my mouth.

Until the order book is more substantial I think we could see some dramatic swings in many coins... although obviously WC will likely be a bloodbath when/if it comes back.  Market movements (even amongst disparate properties) are contagious to some extent.  Rough waters ahead for a few hours perhaps.

I'm digging out some BTC paper wallets as we speak just in case.
(But I don't really expect anything too dramatic on the BC side - who knows... this might turn into a real bull-run as everyone flees shakier clone coins and returns to BC).