I keep seeing strange things that look so real?

last night i was sleeping and i got a creepy feeling so i jolted up and i looked on my wall and saw a huge tarantula on it i wanted to scream but couldn't and then is disappeared and it it looked so real. The day before i was waiting for my friend by the park and saw a tall figure wearing all black staring at me. I was creeped and had that same feeling then my friend came and i looked back and it disappeared. I saw that figure twice last week too ....also i herd a noise a while ago and i looked everywhere and all i found was a black feather.... can someone tell me whats up