I've known a few ENTJ's in my life. One thing that I've noticed about ENTJ's(at least the ones I've known) is that they usually keep someone around them(a sidekick of sorts, usually ENFP/J) that they get great pleasure in making fun of while in the presence of others. Strangely enough the ENTJ will usually be pretty kind to this person when in small groups or when it's just them two alone, but I have seen some ENTJ's make a night out of humiliating some of their close friends. I don't think that there is a type that's better at making fun of people than ENTJ's, they say some pretty hilarious/witty things about people, though they can get pretty cruel at times with their humor. I knew one ENTJ in high school that used to love making fun of the custodians during lunch time, it could be funny, but sometimes when getting positive reactions from people when doing things like this, ENTJ's tend to unsuspectingly 'take it too far'.
Are you the custodian who got the broom stick rammed up his ass?
-Cool ENTJ you went to high school with.