The clip Quirrell from Harry Potter and the Sorcerer's Stone (2001) with Daniel Radcliffe, Ian Hart
No, it can't be. Snape, he was the--
Yes, he does seem the type, doesn't he?
Next to him, who would suspect poor, stuttering Professor Quirrell?
But that day, during the Quidditch match, Snape tried to kill me.
No, dear boy. I tried to kill you!
If Snape's cloak hadn't caught fire and broken my eye contact I would have succeeded.
Even with Snape muttering his counter-curse.
Snape was trying to save me?
I knew you were a danger to me, especially after Halloween.
Then you let the troll in!
Very good, Potter, yes.
Snape, unfortunately, wasn't fooled.
While everyone ran about, he went to the third floor to head me off.
He, of course, never trusted me again.
He rarely left me alone. But he doesn't understand.