This scene where J and the other recruits get tested for admission into the MIB is such simple effective humor, but something I literally didn't realize until I just rewatched it is that this line is such an overt burn that got me laughing hard.
For those who can't watch the clip:
Gentlemen! Congratulations, you're everything we've come to expect from years of government training.
Translation: you're stupid well-trained idiots who can't think for yourselves.
So simple, so well done.