how dangerous it is
Sé lo peligroso que es Tom.
I know how dangerous Tom is.
I can see how dangerous it is.
Tal vez deberías recordar lo peligroso que es Tom.
Perhaps you should remember how dangerous Tom is.
No puedes ni imaginarte lo peligroso que es equivocarse aquí.
You can't even imagine how dangerous it is to make a mistake here.
— Stalker (1979)