Hit (one) like a ton of bricks American informal verb phrase
To have a strong emotional impact on someone
The loss of her job has hit her like a ton of bricks. She has no idea how to manage to survive.
My parents' divorce hit me like a ton of bricks.
The news that he's got cancer in his stomach hit him like a ton of bricks.
The verb “hit" should be conjugated according to its tense.
This expression originated in early nineteenth-century America as “a thousand of brick” presumably because bricks in such quantity were more commonly counted than weighed. Sometime in the early twentieth century, it was replaced by "ton'', which has survived.
The similarity between the children and their parents
I looked at my father's eyes, then looked at my eyes. I thought the apple doesn't fall far from the tree.