Continuity mistake: When Fletch goes to visit Calculus in his shack, he knocks on the window and sees Calculus sitting in a chair, wearing boots. The next shot, as Fletch is walking inside, Calculus is now wearing socks and no boots, despite never having left the seated position, nor having had any time to slide his feet out of the boots. (00:35:55)
Continuity mistake: When Ellie falls from the tree after the rope from the tyre breaks, Louis runs with his wife to see how she is. Louis is wearing a plain white crewneck T-shirt with the sleeves rolled up. When Rachael yells "Gage!", you now see Louis wearing a striped white unbuttoned collared shirt and sunglasses. When Louis is running for Gage, he's back to his plain white T-shirt with the sleeves rolled up. (00:05:40)