You have a new neighbour,he's in a late 20s,but he always hide his left face with a half silver mask

Your window is Opposite of his window,so you can see Clearly if he doesnt close the curtain

One day,you take a look at the window,and you see him,he doesnt use his mask,exposing his left face,its burnt,his left eye also all black,thats why he always cover it

When he notice you,he fastly close his curtain and use his mask again,he looks worried,muttering by himself "did she Saw my face.."