That is impossible. Opportunity doesn’t come knocking twice!
They are preparing for whats coming afterwards
He kept coming out of no where
Burglars don't knock!
A. "It's okay Daddy I'm not hurt."
She had no arms Knock knock. Who's there? Not Sally. What did Sally get for her Birthday? We don't know, she didn't open it yet.
Bless you!
So they can open doors of opportunity for their students.