One of the writers of this was none other than Jeph Loeb!
Visible Boom Mic: Seen in the reflection of a car window when Bennett's vehicle drives away after dropping off Matrix at the airportnote In other words, after Arnold utters, "I'll be back.", along with the reflection of the boom operator in a lavender shirt.
The final fight between Matrix and Bennett was supposed to take place on an island that was in the middle of a naval exercise between the USMC and the USN (actually referenced by the radio chatter when Matrix steals the seaplane). Unfortunately, the film used up its special effects budget killing hundreds of mooks.