J’ai eu la peur de ma vie lorsque j’ai vu l’accident de voiture.
I had the scare of my life when I saw the car accident.

Elle a eu la peur de sa vie en sautant en parachute pour la première fois.
She had the fright of her life when she went skydiving for the first time.

Nous avons eu la peur de notre vie en entendant un bruit étrange dans la maison la nuit.
We had the scare of our lives when we heard a strange noise in the house at night.

Il a eu la peur de sa vie en se retrouvant face à un serpent venimeux lors de sa randonnée.
He had the fright of his life when he came face to face with a venomous snake during his hike.

Les passagers ont eu la peur de leur vie lorsque l’avion a traversé une zone de turbulences.
The passengers had the scare of their lives when the plane went through a zone of turbulence.