"This must be the bottom, so better get on board before you miss the train! Wouldn't you hate to wake up next week and find the Market 15% higher and kick yourself because you missed the train?"
You wouldn't have to kick yourself, because the next day it would be 17% lower than it was before, and you could buy even cheaper. (Except that the next week it would be even lower.)
Prediction: NASDAQ will hit 1000 before it turns around for good. And that may take another six months.