The Croods (2013)

Continuity mistake: When Eep meets Guy at the fire for the first time, she throws a big rock at him. He yells in pain, and you can see his leg is pinned. But as she picks him up and sniffs at him, the rock is two or three feet away. Even if the rock rolled off his leg, it was way too heavy to lift him up with no effort at all.

Hermias Nieuwoudt

Grug: Never not be afraid.

Question: If Grug is so scared of things in the outside world and considers anything new to be dangerous, then why does he keep Guy with him instead of getting rid of him?