['I saw a clown walking down my street yesterday. I got so scared because I thought he was after me.', 'Why did you think he was after you?', 'He kept looking at me and walking towards me. I locked my door and hid under my bed cowering in fear.']
Although you might have really been scared your story sound kind of funny!
Yesterday I saw a clown walking down the street. I am afraid of clowns. I thought he would start chasing after me.