Almost every IPO rise on the first trading days, often by 50%, 100% or even more.
The catch is that you need excellent relations in the world of finances because it's clear that if you enlist in an IPO like a nobody, you will pay the big price and won't make that much profit. Practicaly you have to be in the first to buy.
As MDZ said, he was probably extremely lucky (betting large sum on a stock which quadrupled and another which sextupled).
But it's always easier to make money when you have good friends who work for financial banks and who are specialized in IPO trading. That's where he gets his luck from.
Don't worry, if it was so easy, everybody would do that.
