@veektarius: You ever see Jack, just ignore his boisterous presence. Immediately when I saw him, from the comic book, I knew he was going to offend everyone and be an asshole. He is a "hero"/ good guy in the comic though and a main character of the series. Like a Tony Stark, but a huge dick and doesn't understand why everyone doesn't get his sense of humor.
He supports you and realizes you're being serious and stops joking when you don't throw him out.