"You fight for the guy who's fighting next to you."Bobby Trench (Denzel Washington) is an undercover DEA Agent trying to take down drug lord Papi Greco for dealing cocaine. After being given a two week deadline by his boss, and facing a major set-back when the man he was trying to flip on Papi winds up dead, he takes some advice from his acquaintance Stig (Mark Wahlberg) and agrees to rob the bank where Papi keeps the money from his operation. Unfortunately for him, Stigman's an undercover US Navy officer and the bank they just robbed was full of the CIA's money. Who really want it back. Because it's their money. Neither Stig or Bobby realize the other isn't a lowlife crook. Hilarity Ensues.
The film provides examples of:
- Affably Evil: Earl and Papi especially.
- And the Adventure Continues: See Book Ends.
- And This Is For...: "That's for Little Toro."
- Apologetic Attacker: Stig apologizes immediately after shooting Bobby in the shoulder, mutters an unheard apology after sniping one of his former Navy buddies, and later apologizes after reflexively punching a Navy officer in the face.
- Arc Words: "That's correct".
- Back-to-Back Badasses: Bobby and Stig briefly in the climax
- Big Bad Ensemble: Papi, Quince, and Earl.
- Book Ends: The movie begins and ends with the main duo sitting in a diner scoping out a bank for a robbery, only this time they know they're robbing a CIA bank.
- Bittersweet Ending: A rather glossed over one. Stig and Bobby kill all the men who wanted them dead and have some of the money left over from the job, yet Bobby is still presumably considered responsible for his boss's murder and Stig has still been dishonorably discharged from the Navy who decided to throw him under the bus.
- Boom, Headshot: How Papi kills Deb.
- Brick Joke: Bobby getting a '64 Impala for Papi.
- About halfway through the movie, Bobby promises that he's still going to shoot Stig when they're done with everything, to get back at him for shooting Bobby in the shoulder earlier. After the climatic shootout, he does just that.
- CIA Evil, FBI Good: Well, DEA/Navy rather than FBI but the CIA is extra evil to make up for it.
- Comically Missing the Point: Bobby warns Stig about mouthing off at the mooks because their heads could end up in a bowling bag. Stig says it wouldn't be possible, because both of their heads wouldn't fit in one bag.
- The female clerk at the bank completely missed Bobby's joke about the free toaster.
- Cool Car: The '64 Chevy Impala. Stig's 1970 Dodge Challenger also counts. The first generation Plymouth minivan, on the other hand, averts this so very hard.
- Donut Mess with a Cop:Bobby: Didja ever hear the saying, Never rob a bank thatís across from a diner that has the best donuts in three counties?
Stig: Thatís not a saying.
Bobby: Yes it is.
Stig: No itís not. I get what youíre saying, but itís not a saying.
Bobby: Itís a saying.
Bobby: Itís a saying now.
- Flip the Bird: Stig flips off one of his Navy buddies.
- Friendly Sniper: Stigman.Stig: When have you ever seen me miss?
- How We Got Here: The movie starts with Bobby and Stig blowing up a diner and then jumps back about a week and shows the two working together while not realizing the other's status.
- Hypocritical Humor: Stig yells at some guys for shooting at chickens for sport... while eating a chicken leg. Lampshaded by Bobby, to which Stig argues that it's not the same thing.
- Improbable Aiming Skills: Stigman.
- Ironic Echo: "Three inches to the left and ..." and "When have you ever seen me miss?"
- Also, "That's why it's a brilliant plan; no one expected it!"
- And when Earl quotes Bobby on his 'saying' "Have you ever heard the saying, never rob a bank thatís across from a diner that has the best donuts in three counties?"
- Karmic Death: To frame Bobby, Earl shoots his boss three times in the chest while the man is helpless on ground. In the climax, Stig shoots Earl three times in the chest while he's helpless on the ground.
- Large Ham: Earl, played by Bill Paxton.
- Last Name Basis: Stigman, which is also usually shortened to Stig.
- MacGuffin: The money.
- MÍlťe ŗ Trois: At the climax, Bobby and Stig lure the Big Bad Ensemble into a shootout.
- Mexican Standoff: Between the Big Bad Ensemble with Bobby and Stig in the middle of it in the climax.
- Ms. Fanservice: Deb.
- Motor Mouth: Stig at times, courtesy of Mark Wahlberg.
- Obfuscating Stupidity: While being held at gunpoint by someone who wants his car keys, Stig shoves them down the front of his pants, all the while cracking wise. However, it's really a trick, as he waits for the keys to slide down his pants leg, and then kicks them up into the air to distract the man while he goes for his own pistol. Hilariously, it doesn't work."You saw that move coming?""That's correct."
- Pre-Asskicking One-Liner: "Make it rain."
- Reasonable Authority Figure: Subverted with the admiral who seems as if he is this but then is revealed to a Bad Boss throwing Stig under the bus to cover up Quince's illegal actions.
- Reusable Lighter Toss: Stig tosses a Zippo lighter in a diner to start a fire for a distraction at the beginning of the film.
- Right Hand Versus Left Hand: The entire premise is that these two undercover agents have no idea that the other is one as well.
- Robbing the Mob Bank: Well, CIA instead of the mob, but it amounts to the same thing.
- Sir Swears-a-Lot: Stig wins this honor.
- True Companions: Bobby and Stig evolve into this.
- Vitriolic Best Buds: Bobby and Stig.
- World of Badass: Nearly all the major cast members qualify, but Bobby and Stig can outgun them all.