Placing the bowling ball onto the flimsy table caused it to topple over onto the floor.

After several whacks with the axe, the lumberjack started to make the tree topple over with a loud thud.

At first, the blocks in the Jenga game only began to lean until a small wind made the block tower topple down.

When the children stacked their crackers one on top of the other, it eventually would topple over for them to rebuild it.

“If you put one more book on that wobbly bookshelf,” the mother told her husband, “it will topple to the floor.”