You where posting video's like aech day, you stopped and got into bed but then you heard a knock on you're window

You: who is it i don't have any visitors out at night...?

you got up from you're bed and went up to look at the window but you saw no one was it you're imagination?

You: i swear i heard someone...

you then hear a knock on you're door who is it what are you gonna do?