But it is unstable and can tumble down.
Suddenly, a bunch of rocks tumble down the valley toward them. It looks as though they'll be crushed!
When they saw the Giant tumble down and lie quite still, they knew he must be dead.
And as she watched it tumble down the steep slope toward the sea of grass, she realized she must follow.
They always like on the bed to jump up to jump down, so parents' wanting to insure a bed is firm, do not tumble down of danger;
Snow-capped mountains loom in the distance while smaller hills tumble down towards the town, criss-crossed by paths and nibbled away by quarries at their bases.
Long after its frothing tumble down the east side of Logan Pass, this water will stream into the Gulf of Mexico, and eventually join the Atlantic Ocean.
You remember: thousands of two pence coins lie on a moving shelf, and you have to drop in coins of your own in the hope it will cause the pennies to tumble down for you to collect.
Piglets are particularly fond of play, just as human children are, and chase one another, play-fight, play-love, tumble down hills, and generally engage in a wide variety of enjoyable activities.
Sometimes the fall is minor, other times you tumble downstairs or plummet off a cliff into a chasm.
