Directed by: Barry Sonnenfeld
Starring: Tommy Lee Jones, Will Smith, Vincent D'Onofrio, Rip Torn, Tony Shalhoub, Linda Fiorentino
Factual error: When Tommy Lee Jones is looking at his wife on the computer, he had typed in Truro (in Cape Cod, Mass.), but when he zoomed in, it was on the lower cape; Truro is located on the upper cape near the tip. (00:58:40)
Factual error: When showing Orion's Belt on the screen the stars Alnitak and Mintaka are the wrong way round.
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. (01:16:00)
Kay: Imagine a giant cockroach with unlimited strength, a massive inferiority complex and a really short temper is tear assing around Manhattan in a brand new Edgar-suit. That sound like fun?
Answer: K and his partner both knew about aliens living on Earth, and made it their duty to make sure no one else knew about it. When the trooper saw Mikey in his real form, and Mikey spotted him, he attacked the trooper in an attempt to kill him, probably to ensure that the trooper wouldn't be alive to expose them. Since K and the other agent were already aware of Mikey, as they had dealings with him before, Mikey didn't attack them.