Continuity mistake: When Lai has to pee and runs off down the hill, we see Frank run after her and pick the duct tape (from her mouth) up off the ground. It is obviously covered in sticks and dirt when he finds it, only to be clean when he finds her and sticks it back on her mouth. (00:23:05)
Other mistake: When Frank's car is blown up as he returns from delivering Lai, he is blown off his feet by the blast, and is standing about 50 feet away from it. Yet the plastic table and chairs, just in front of the car, are blown straight up, not away from it. (00:28:15)
Continuity mistake: When Frank begins his revenge rampage on Wall Street's men, there's a close-up of Lai bound to the office chair with duct tape across her mouth and the slit Frank made earlier is gone, so at first it's to be presumed that it's a new piece of tape. However, when Lai pokes her head out from the back seat of the car Frank stole, there is a slit in the tape, but when he pulls her and the chair out onto the road the slit's gone, only to return again when Frank brings her to his house. (00:28:40 - 00:32:50)
Continuity mistake: When Frank's revenge at Wall Street's home is near an end, as Lai rolls the office chair toward the door her legs are bound to the chair base, and her hands are tied behind her back (not to the chair). When Frank finds Lai in the car, now the rope is only tied around her ankles when he removes her (and if that were the case she had no reason to hide in the car with the chair in the first place). (00:29:15)
Plot hole: When Frank Martin steals the Mercedes, how does Lai manage to open the rear door, get in the back and hide - all with her hands bound behind an office chair? Not to mention actually closing the door and hiding herself (and the chair) in the rear footwell long enough for Frank to drive off and not notice her until they are out on the road. (00:29:25)
Visible crew/equipment: At Wall Street's home, as the two men with the axes attack Frank, when the Asian man kicks Frank in the stomach in the shot looking up, the top of the set is visible in the mirror's reflection. (00:29:45)
Revealing mistake: After his car explodes, Frank exacts revenge on Wall Street's men. With the last one he takes out, before he fires the man's gun at the walls, he leaps into the air, flips, kicks the man back and then lands. The Asian stuntman, who has more hair than Frank and wears shoes with tread detail, unlike Frank, is too obvious. (00:30:05)
Continuity mistake: Frank has the fastest microwave in the world. It looked like he programmed his microwave for three minutes to cook noodles. Frank then talks to Lai for just over 30 seconds when the microwave beeps, indicating the time is up. (00:33:35)
Revealing mistake: In the hospital room scene, Wall Street stuffed a cloth into his employee's mouth, killing him. Wall Street then hooks the life support wire to the other living guy. As he walks out, you can see the dead man's neck moving as if still breathing. (00:38:25)
Factual error: When Frank and the woman get shot at in his house, the bullets go through the walls like they were cardboard. This type of construction has 1-2 feet thick dense rock walls. Normal guns and bullets won't get through it at all. (00:40:00 - 00:45:00)
Continuity mistake: When Inspector Tarconi is in Frank's kitchen eating Lai's Madeleine cookies, he's holding the cookie with his left hand in the close-up, but next shot it's in his right hand as he takes another bite. (00:40:40)
Continuity mistake: When the inspector comes into Frank's house for coffee, Frank pours some milk into his cup. In the following shots the milk bottle is full again. (00:40:55)
Continuity mistake: As Frank is checking the containers, Lai is held captive and drinking tea when her father comes in. After he slaps her, the tea bag and cup fly across the table, but next shot they're near her hands. (01:05:00)
Continuity mistake: After Lai is slapped by her father, when they all leave Frank leaps onto the side of the trailer with the container load. The side he leaps onto has no distinctive characteristics, but when he jumps off now there is a short lower horizontal rail below the gap in the wall's surface ridges. (Fullscreen DVD) (01:09:40)
Continuity mistake: When Frank jumps from the trailer with the container load he lands on the roof of a bus, passing under the overpass, whose number is 15 and has a large ad on its side, under the windows. When viewed from the front, the bus number is 21 and the ad has changed, though he hasn't changed busses. (01:10:15)
Continuity mistake: In the garage fight scene, Frank slathers himself in motor oil to gain a slippery advantage over the mob of attackers. He escapes by diving through a window, plunging into the bay below. After a swim to safety, he is perfectly clean. (01:13:45 - 01:16:00)
Revealing mistake: When oil covered Frank breaks off the bike pedals, and slips his boots into them, in a following close-up we see an extra strap around his boot and the laces are actually tied over the pedal strap, to keep them secure. (01:14:20)
Revealing mistake: As Frank is about to be shot in the warehouse, he pulls the giant thug in front of him as a body shield. They both fall back through the window and hit the water. As they do, we see the back of Frank's hair, which is something of a shag style. It is far from being Jason Statham, as throughout the film his buzz cut is almost to the point of him being bald. (01:15:10)
Revealing mistake: As Frank is about to be shot in the warehouse, he pulls the Giant Thug in front of him as a body shield. They both fall back through the window and hit the water. Since an oil drum is thrown on the water then shot to light the water ablaze, Frank needs more oxygen. He goes to the Giant Thug to extract some from his lungs. Right before they cut to close-up, you see the Thug is a painfully obvious, stiff-armed dummy. (01:15:40)
Continuity mistake: In the scene at the waterfront, Frank and a thug go out the window into the water. When Frank gets out of the water, we see his arm reaching up to pull himself out and his arm is completely dry. In the next shot, he is wet again. (01:16:00)
Answer: It's not in the soundtrack. The song is "Fighting Man" by "DJ Pone & Drixxxe".