Factual error: Helicopter rotor blades do not unfold by themselves and there is no way to unfold them from inside the helicopter. A trained mechanic with the right tools and equipment (including the proper ladder for the job) will take a minimum of twenty minutes to rig a four bladed rotor, and that's if (s)he's in a hurry. An airborne (i.e. falling) helicopter? Forget it. (00:07:40)
Factual error: When escaping with Ray Carter in Mongolia, the Angels drive a truck across a bridge and encounter a tank. The tank used is an old U.S. Army M48 or M60 with a red star painted on the turret - not likely to be found in Mongolia.
Factual error: When Dylan tries to kick Madison and she catches her foot Madison twists Dylan's foot straight down and you hear bones popping, but after getting flipped and kicked she gets up without so much as a limp. Her ankle should have been broken/dislocated at this point. (01:15:00)
Factual error: In the scene where the helicopter falls off the bridge there isn't enough time to start the helicopter, let the systems get enough pressure and get the blades rotating fast enough to provide enough lift to fly plus at the angle the helicopter was falling it couldn't even auto rotate. (00:07:40)
Factual error: When Lucy L. is using the gas pipe as a flamethrower, it is suddenly turned off afterward. This could be because of one of the other characters turning the handle, but if they turned it off in that way (or any way), the flame would go inside the tube and make the tank blow up. (00:58:40)
Factual error: Before Cameron goes surfing the girls mention that there's a hurricane off the coast causing good waves. There are no hurricanes in the Pacific Ocean, only typhoons.
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.