Revealing mistake: When the cop makes a mold of Dave's face from the impact site, there are nostrils in the mold, which are not possible to make with such an imprint.
Continuity mistake: When the sergeant balls up the paper with the drawing of Dave and throws it at the cop, the cop keeps it and unballs it. The paper is clearly very wrinkled, but when he puts it in the fax, it is too straight for him to have straightened it out that fast.
Continuity mistake: When Dave sees the photo of Josh and the Orb on the counter, he picks it up and looks at it. But from the view inside Dave's head, the picture is still sitting on the counter.
Other mistake: There's a licence plate on the front of her speeding vehicle, but not when she hits him at the start of the movie.
Other mistake: At school when Dave calls him into the hallway the backpack strap is hanging then not.
Continuity mistake: When Dave and Josh are walking in the park and Dave ask Josh , "Did you see last night's sports competition?", the sun is shining making shadows on the ground behind them. In the next shot the sunshine and shadows are gone.
Answer: "There is a strength to this one." Just meaning he sees Gina as a strong, independent woman who's been able to keep going despite losing her husband.
Bishop73