This movie was designed for 3D so there is an emphasis on surprise and things jumping out at you.
Even when seen in regular format, these scenes are very intense and are intended to fright the audience, young or old.
A woman almost drowns but is rescued.
A boy is carried away by the wind.
A cave opening collapses after an explosion, trapping people inside (no one is hurt).
A man falls down the side of a cliff (he is unhurt), a man almost walks off a cliff.
People ride mine carts through tunnels, crashing and jumping tracks, and are frightened.
There are two explosions and no one is hurt, but people are lifted into the air with one explosion and are scared as they fall.
People fall down a volcano tube (they fall very far, screaming, and end up in water).