What does he mean by that? Here's two pictures that tell the whole story:
The first one is today's 1-minute chart for the stock, which literally looks like somebody cut off the bottom portion of the chart, right at its IPO price of 38. Charts aren't supposed to have floors like that.
The second picture tells you why that happened--it shows the bids and offers for Facebook stock during those few minutes (courtesy of BusinessInsider). I've circled the monstrous size of the 38.00 bid for you--that is so big that it could only be the underwriters of the IPO, protecting the stock to make sure that it didn't trade below the IPO price (which would be an epic embarrassment).
I'll get back to my usually scheduled programming to send you into the weekend, but I felt like I had to share this, because I know a lot of you are (and were) following the hype on this one. Very, very strange day, and one that has to be somewhat ominous for Facebook and its shareholders.