The Voice

I don't know whether it's really like what we think but my room mate and I heard this voice, a ghost voice around 4 am today! It couldn't be my imagination or I begin to hear voices in my head because my room mate heard it too. It turned out later that one of my housemates saw this figure peeking into the house from the sliding door. I don't know whether to believe it or not but the previous tenant also claimed that he saw this figure too. As long as 'it' didn't harm anyone, I'm alright with it.