I was once speaking to a good friend of mine here, in English.
"Do you want to go out for yakitori?"
"Go fuck yourself!"
"... switches to Japanese Have I recently done anything very major to offend you?"
"No, of course not."
"Oh, OK, I was worried. So that phrase, that's something you would only say under extreme distress when you had maximal desire to offend me, or I suppose you could use it jokingly between friends, but neither you nor I generally talk that way."
"I learned it from a movie. I thought it meant "No.""
"You might want to not repeat it ever again."
Along the same lines, I was getting a shave from a super hospitable barber last November in Gifu and the topic of conversation in very broken English (from him) and correspondingly broken Japanese (from me) was basically whether I had seen all of his favorite American movies. We were chatting and laughing quite a lot. When the time came for him to shave around the Adam's apple, he pointed right at my face and said: "You! Shut up!" It was so funny: He had obviously picked that up from a movie, but it took everything in me not to feel a little hurt, even though I knew he didn't mean to say what he said with that sort of edge. I can only imagine how many times I've done something similar in reverse. :-)
As explained below, Karpeles referred to himself as "ore". "Ore" is mostly used by men, and carries a boastful tone. Moreover, pronouns aren't necessary to make grammatical sentences, e.g. "I went to the bank" = "Ginko ni ikimashita" = "[Bank] [to] [did go]".
The only function of the word "ore" is to emphasize your own high status relative to whomever you're speaking to. In a bar, after a couple of drinks, among equals, it's quite typical for all the men (usually not women) to use "ore". But in a formal business meeting --- this is known to be an absolute no-no by anyone who has formally learned even a small amount of Japanese.
A fairly close analogy in English would be to randomly sprinkle the word "fuck" in your speech.