If you're talking about ideal circumstances where we somehow got all the miners to participate, it would still amount to only about 3600 BTC that were created that day.   By MtGox standards, that's a shift of about $2 in either direction, depending on market buy/sell pressure.  Now if you somehow hyped it so that everyone expected no new coins to be sold that day, then market psychology would begin to talk over and people would be more likely to hold instead of sell that day ( a self fulfilling prophecy).  Sensing that the market was overbought, they may sell back June 11th.