Audio problem: When Will Smith is looking at the two space ships at the MIB headquarters, if you look in the background Zed and K are there typing on the computer. But if you look closer you can tell that they're not even touching the keyboard and the sounds are just added into the movie.
Continuity mistake: Just before the diner scene, where the two aliens are discussing the galaxy, we see the outside of the Russian restaurant. The neon sign says "haroshaya" meaning "good" all the way across the window, in the next shot inside the restaurant, the "ha", which looks like the English letters "xo", is gone and the sign is centered.
J: All right, I'm in. 'Cause, look, there's some next-level shit going on around here, and I'm with that. But, before y'all get to beaming me up, there's a couple things I want you to understand. First off, you chose me. So you recognize the skills. And I don't want nobody calling me "Son", or "Kid", or "Sport", or nothing like that, cool?
K: Cool, whatever you say, Slick, but I need to tell you something about all your skills. As of right now, they mean precisely dick.
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