I once heard banging in the 2nd floor of my house like if someone was stomping with boots when I was the only one there.
Being the wuss I am, I got a really sharp throwing dart (first thing I saw) and began going up the staircase. When I got there I saw one of my blankets looking like someone was in it. It was in the other side of the bed, so I began going around. When I got there I opened up the blanket and nothing was there. The blanket just collapsed.
Also, one time, a dead petrified cat with no eyeballs just appeared on our back window doors. It was positioned like it was curled up in pain and looking STRAIGHT INTO THE DOOR. IT LOOKED LIKE IT WAS STARING INTO YOUR SOUL. Jeez. It just looked miserable, even though it was probably dead for a long time. The fur was completely clean and it had everything a normal cat would have except the eyeballs.