You are planning to go to your friends house as you knock on the door. Someone unexpected opens the door. Somebody you do not know. He seems middle-aged. He has bandages on his right arm, right hand, and up his neck. You know this is not your friends dad. You went to the wrong house.

“What do you want.”

he asks. He seems angry. You notice his house has many signs such as “keep out, stay away”, ect. However, How will you explain what happened?