$400,000 isnt neccasarily hard to make. Think of all those stocks that ramped up 400% from the summer time. There were quite a few characters who ran in with heavy leverage and went long.
Then before the summer time there were the energy stocks in 2005. I remember stocks like TMY going from the 2 to 7 bucks. There were quite a few China stocks too that your familiar with...
To make that kind of cash, all you have to do is be in the right place at the right time. Unfortunately, times like the summer are scary times to throw all your cash into a few stocks. Its relatively easy to throw cash at stocks when they are at the top with the attitude of buy high, sell higher.
It takes balls to get in at the very bottom when everyone else is very scared. . .