I like to imagine a panicked, anxious trader... finally capitulating and deciding to sell all of his remaining bitcoins... so that he can pay off some accumulating debts. However, in his state of clouded judgement and jitters, he hits "market buy" instead of "market sell" and all of his remaining fiat get turned into bitcoins. Since there was no wall to buy into, the price jumps by $10... and some speculators posts on forums about a huge buy order. "Buy order?" "Buying?" "Buy" "BUY" "BUY!!!!" "CCMF WE"RE GOING TO THE MOON" they post. An enormous rally begins.
The previously panicked trader, realizing what happened, decides to capitalize on the moment the only way he knows how.
He logs into Bitcointalk.org and posts, "I totally called the bottom."