This is the 14834th most frequent Russian word.
повалила
"Повалила" means "knocked down" or "collapsed."
In this case, 'повалила' describes a group moving quickly and chaotically.
Толпа повалила внутрь здания, спасаясь от дождя.
The crowd rushed inside the building to escape the rain.
Here, 'повалил' signifies an external force causing an object to collapse.
Сильный ветер повалил забор.
The strong wind knocked down the fence.
Here, 'повалила' indicates an action of causing something (the tree) to fall.