Factual error: In the scene where the FBI agents have taken Giovanni Ribisi in for interrogation, one of the FBI agents says at one point "...and I want the whole C:/ Drive backed up on a floppy.", which is pretty hard to do, if not impossible, unless you've got about a 5Mb hard disk drive (depending on compression levels). But later on in the scene where Ribisi is actually doing it, he does it in about 10 seconds...with a 1.44MB floppy.
Other mistake: In the scenes after Giovanni Ribisi is arrested, his looks are constantly changing. In scenes where he is talking to Vin Disel his face is very fat. When he walks by Abby's desk he is thin again. If you get Boiler Room on DVD you'll see an original ending where Ribisi is thin all the way through the end of the movie; Because Giovanni was preparing for a film that required him to gain 30 something pounds, the scenes that needed to be reshot for a different ending are very defined.
Greg Weinstein: I hope this is better than the last batch of shit you gave me. Produced more wood than Ron Jeremy. I don't want you to yell, "Reco!" anymore. Know what you should yell?"Timber!" Yeah, Mr. Fuckin' wood. I hear you fuckin' makin' your calls. It's bullshit, all right? I mean if you want them off the phone so bad, why don't you just hang up? You should get them excited. You know, excited? They should beg for a broker on the first call.
Greg Weinstein: Hang up. Hang up the phone.
Seth Davis: Thank you. That's nice for you to do that for me.
Greg Weinstein: First of all, there's gonna be a lot of these regardless of how good you are but you happen to suck big fat ass rhinoceros dick.
Seth Davis: Well, thank you. That's confidence inspiring.
Question: Anyone in a sales floor realizes that if you have a lot of people in one room talking at the same time, there's background noise. Yet only one or two people have active noise canceling headsets. Everyone else uses handsets. Either everyone should or no one should. Why the difference?
Question: Did the arriving FBI agents at the end of the movie let Seth leave because they knew he was going to testify against the firm?