The maid lost her balance and toppled over.
The two of them toppled to the floor with the book.
She toppled through it into their hotel room.
Her distress toppled into full blown despair.
Embarrassed, she didn't notice her right foot reaching nothing but air until she toppled backwards.
Unaccustomed to the weight of the rucksack on her back, she almost toppled over at the first step of the stairwell and caught the banister with both hands.
It opened only when the other had closed, and she toppled into Mansr's arms.
One bag toppled then another.