Directed by: Barry Sonnenfeld
Starring: Tommy Lee Jones, Will Smith, Vincent D'Onofrio, Rip Torn, Tony Shalhoub, Linda Fiorentino
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)
Audio problem: When Jay goes to join MIB, he greets the security guard with "'sup pops?" without moving his lips. (00:33:40)
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)
Large cop: If you were half the man I am... [Jay looks pointedly at policeman's stomach] I am half the man you are!
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.