Background information: you are an extremely good fighter, and the only one capable of taking down Dumbledore other than Credence. You have refused to pledge allegiance to him, so he has hunted you across the world

you are wandering around in a much less busy part of diagon alley, minding your own business. Suddenly a man comes from behind you and grabs you, putting his hand on your mouth. You identify him as Gellert Grindelwald almost immediately.

"Don't move. Don't make a sound"