Continuity mistake: In the beginning of the movie when the Angels are rescuing the US Marshall, Lucy Liu is wearing stiletto heeled boots. When they jump out of the window, the heels are square. (00:01:30 - 00:06:40)
Continuity mistake: When Madison is speeding away in her Shelby Cobra with the Angels hanging on, she crashes into a theatre. While in the theatre, there are shots of the car in the background. It is a completely different car than the Shelby that Madison was driving a few minutes before. The racing stripes are thicker, the wheels are different and the car is actually a lot bigger. (01:31:30 - 01:33:10)
Continuity mistake: In the scene where Natalie is in the men's room at Pete's high school reunion, she first pulls down her red and white Spider-man underwear, but later when the stalls fall over her underwear appears to be black.
Continuity mistake: When Demi Moore shoots the Angels off the side of the observatory, the bullet intended for Drew Barrymore hits her in the lower abdomen. Later in the movie when the Angels wake up on the lawn below the observatory, the only bullet hole in Drew's shirt is on her upper left chest. (01:17:05 - 01:20:25)
Continuity mistake: When the Angels are walking through the sprinklers after getting shot, you can see the bullet holes in each one of the Angels' shirts. When they get to the car, and it blows up, Cameron Diaz's bullet hole disappears. (01:20:00 - 01:21:30)
Continuity mistake: In the dirt bike racing scene, there's a long "slow-motion" shot that includes a large section of a very patchy-cloudy sky. In all other shots of the race, the sky is clear blue. (00:32:45)
Continuity mistake: At the beginning of the movie, when the three Angels and the US Marshall escape from the house in Mongolia, they break a window and there are many glass chips, but when they hit the ground, the glass has disappeared. (00:06:20)
Continuity mistake: When the Angels get shot off the observatory, Natalie is between Alex and Dylan. When the next shot shows them on the ground, Natalie is on the far right, past Dylan. (01:17:15)
Continuity mistake: When the Angels are walking through the sprinklers, they get soaked. But after their car blows up and they are lying on the ground Drew Barrymore's hair is dry along with Lucy Liu's. (01:21:30)
Continuity mistake: After the car scene where Drew and Lucy fall off the car, it bounces at least 13 times and then goes through a theater. It is no longer dented or smashed at all. (01:32:05)
Continuity mistake: When Dylan tries to roundhouse kick Madison from behind, Madison catches her foot and twists it so her toes are pointing down. In the next frame just before Madison throws Dylan over her shoulder, Dylan's toes are pointing up. (01:15:25)
Continuity mistake: When the Angels encounter Madison at the observatory they are supposedly wearing bullet-proof vests. You can tell through Nat's shirt she isn't wearing one. After they are shot, you can see the shirt is bulky from the vest. (01:17:00 - 01:20:00)
Continuity mistake: When Natalie is talking to the surfer by his car, Alex and Dylan are under the car looking through his belongings. After he gets into the car to drive off, it cuts to Natalie and she says something, cuts back to the surfer pulling away in his car and then cuts to a shot of Dylan but you can see the surfer's leg/towel in the shot. Shouldn't he already be in the car? (00:28:45)
Continuity mistake: This is during the fight between the Angels and O'Grady's thugs. Seamus has Dylan against a container. He aims to punch Dylan but misses and hits the container to the right of her face instead. There's white writing on the container. Cut to the next shot and the writing is now to the left of Dylan's face. (00:56:25)
Continuity mistake: In the roof fight, Dylan gets knocked off the roof and grabs the fallen E. Her hands were holding on to the lower piece, but in the next shot her hands are at the top.
Continuity mistake: When Natalie jumps into the boat she is wearing flat heeled shoes, but in the earlier fire scene she is wearing black stiletto boots. (This is visible in zoom and slo-mo.) (00:58:55)
Continuity mistake: At the end of the Angels' last fight with Demi Moore, we get a closeup of Demi's mouth. It is bloody and her teeth are covered in red. A few seconds later, after she falls backward through the floor and begins to scream, there is no blood on her face and her teeth are pearly white. (01:35:10)
Continuity mistake: When Alex is rescuing Ray Carter, the blood on his shirt is on the right hand side. When Ray says, "Ah, my ribs", the blood is on the left hand side. Afterwards, the blood's on the right hand side.
Continuity mistake: When Seamus surprises the Angels in the hull of the ship, Natalie drops the champagne bottle, which explodes spraying champagne everywhere. But for the rest of the scene, the champagne and the shattered remains of the bottle are gone.
Continuity mistake: When the Angels are dancing at Natalie's place, Alex is wearing very high wedge heels. When they tip over the couch, Alex is suddenly barefoot. (00:13:30)
Answer: It is making fun of the show CSI. Even still, there are ways of telling if someone had a knee problem by the way they walk and put pressure on the foot. Being able to tell if it was a torn tendon, I don't think so. Check out the way people run and you can tell if they have hurt something in the past because of which leg they favor.