Eep's wide-eyed fascination with wind-blown cinders, drifting and glowing in the darkness. The moreso if you consider it's possibly the first time in her life she's had the chance to savor the sight of something beautiful.
Grug and Guy coming to a mutual understanding while trapped in tar, then helping each other get out. Their method of escape would be best put under Funny moments.
After being manhandled within an inch of his life, Guy finally escapes the Croods! But while he is hiding, he catches a glimpse of the family looking for him. Eep stares after the spot where he disappeared, looking hopeful and confused. With a sigh, Guy returns and pretends he just went away to find materials to make shoes.
Picture it: Grug and Eep are at the edge of the cliff, with the world collapsing behind them. Right before Grug gets ready to throw her across the chasm, he pulls her in for a hug. It just goes to show, despite the bickering they've done throughout the film, there remains that bond between father and daughter.
When Ugga tells Guy that she knows how difficult it must be for him to travel with them, and thanks him for helping them have "the best day of our lives." It's an extremely sweet, maternal moment from her, especially for Guy, who has been on his own from such a young age.
Grug going back to save Douglas and other critters from the eruption.
"I love you too."
The first night after the family loses the cave, Grug tells a story about why Eep's curiousity is bad. Guy, who is not part of the group yet, offers a story of his own: Once upon a time, there was a girl who kept getting too close to the edge of a cliff. Her parents warned her it was dangerous, but she wanted to follow the sun. One day she got too close to the edge of the cliff, fell off...and FLEW. The hope and happiness on Eep's face is heartbreaking and wonderful, and it becomes a huge transitional moment for the whole family...except Grug, who points out that they don't know how to fly.
Of course, later Grug is the one who helps Eep to fly: by using his strength to hurl her from the cliff across the lava pit that is obstructing their way to the other side.
And then LATER, Grug figures out a very...interesting way of flying. From a distance, it looks as though he is riding the sun.
When Grug raises his hand to "touch the light", showing that he finally understands Eep and Guy's desire for a new life.
After making it across the chasm, Eep won't stop blowing her shell to call to Grug. Behind her, the others try to figure out how to get her to give up. Gran volunteers...but after looking into her granddaughter's eyes, takes up her own shell and starts blowing out the call as well. Soon everyone joins in: they want to know that Grug is safe, and they want Grug to know that they love him and are looking for him.
The moment Grug, left behind and facing certain death, finds himself face to face with Chunky, the huge saber tooth tiger chasing his family for much of the trek, and finding he's a friendly fellow who somehow knows that they need each other to survive this mess. After they manage to get to safety, Chunky becomes Grug's mount, eager to explore the new land with him.
Grug: "Turns out, I'm a cat person."
"1, 2..., 3..., 4, 5, 6. And 7."
And a half...sigh...8...*facepalms* 9...
Belt and Sandy saying "Dun dun duuuuuuun" together...and then hugging.
Grug's cave painting after being seperated from the rest of the family at the chasm, though it doubles very heavily as a Tear Jerker.