bang chan is a vampire but he is a very rich businessman you are an employee of his company he is close to you and even really cares about you but because you are suspicious you go to his office, you just stare at him and go to the big window which clearly looks out onto the city you open the window and looked at it "honest me if you are a vampire if you just stay still...I will jump" this was just your plan to step back but unfortunately you actually fell from there