When Hickey takes a giant swig of the carton from the fridge, he obviously spills a lot of the liquid on him, yet moments later, he and his clothes are dry.
In the scene where Joe hits Karen across the face with his cell phone , she is sitting in the passenger seat while he is driving. So he hits her on the left side of her face. In the next scene, he is helping her apply makeup to the bruise over her right eye.
The necktie that covers Karen's eyes starts with the thicker part over her right eye. When they stop to get out of the car, the tie flips.
When Cheryl first meets Will and flirts with him at his hotel room she's wearing bright red lipstick. As soon as they're in the room when she reveals who she really is her lipstick mysteriously disappears.
We see snow or rain in the headlights of Karen and Joe's Jeep as they drive out into the woods to drop off the daughter's medicine, but not in the lights of the truck that Marvin is driving on the same road.
In the seaplane scene, Cheryl's not wearing a headset. When in a private aircraft, all passengers must wear headsets in order to hear and talk to one another. Even when shouting over the engine, without a headset, you won't be heard-it's simply too loud.
Succinylcholine, also known as Suxamethonium chloride, is depolarizing neuromuscular blocker. It is rapid IV onset of less than minute and a duration of 5- 10 minutes in most individuals. It works to depolarize the nerve cells at the neuromuscular junction causing rapid flaccid paralysis which results in the user being unable to move and breath. Although this is portrayed accurately in the movie, there is no know antidote. Even if there could be one found, once the drug has had its effect of paralysis, the only way to have termination of effect is for the drug to be metabolized and for the body to recover in 5- 10 minutes (which before then would also require medical interventions to assist with breathing).
When Joe calls Cheryl in the hotel, after he hangs up on her, we hear a dial tone from her phone. Both phones are cell phones, which do not provide dial tone.
When Abby takes a puff from her inhaler, a cloud of smoke is visible - indicating that Abby is breathing out, not in.
When Marvin and Abby are sitting in the cabin watching The Secret of NIMH (1982), the audio is from a separate part of the film than the visual that is shown.
When they are locating the source of the cell phone, it is reported to be coming from Zillah in the East Cascades. Zillih is actually over an hour from the foothills of the Cascades
The current Hospital where Will works is said to be Astoria Memorial Hospital in "downtown" Portland (Oregon). But when Joe reads Abby's prescription bottle it plainly shows the Astoria Memorial Hospital address as 3297 Cedar St. in the city of Astoria, Oregon with the actual Astoria's correct zip code 97103 and area code of 503. The real hospital in Astoria is Columbia Memorial on Exchange St.