My friend and I visited my grandma's house. She lives alone and she was out when we went. While I was fixing something, my friend was busy exploring the house. She then opened my grandma's bedroom door.

She whispered and slowly asked me, "Isn't your grandmother outside?'.

"Yes", I responded.

"Then who is that...?", her voice was shaking as she pointed to a human-shaped covered in blanket and lying on the bed.

We both screamed to the top of our lungs and just dashed outside without inspecting.

Up to this date, we never knew who or what it was. 

Or maybe it was a thief LOL