to startle, to make someone jump
Did I startle you?
Quand la porte a claqué de manière inattendue, cela m'a fait sursauter.
When the door slammed unexpectedly, it made me jump.
Pardon, je ne voulais pas te faire sursauter.
Sorry, I didn't mean to startle you.
L'explosion nous fit sursauter.
The explosion made us jump.
She startled him.