This occurred when I was 8 years old.
I was in bed though not asleep, when I heard what sounded like 3 taps on my bedroom window. I sat up in bed to look at my window and what I saw scared the living daylights out of me! This 'thing' was sat on my windowsill on the outside, humanoid, about the same size as a 4 year old child but it's body was almost skeletal, it was so thin, it made the things head look slightly too big for its body. It had no hair whatsoever, but large black-red eyes and a mouth full of lots of sharp little teeth almost like a cats. I hid under the covers very scared and didn't get any sleep that night at all.
The next morning I told my mum what I had seen but she dismissed it as a dream and didn't believe me, so as I went to school that day I told nobody fearing everyone wouldn't believe me or I would get teased.
After school I went up to my bedroom window where I had seen this 'thing' I saw 3 small scratches on the outside of the window, my window was a sash window and the scratches were located in such a place that the only way to have made them would be if someone had climbed a ladder to my window and made them.
Fast forward a few years later I am now 14 years old and in secondary school and though I had told nobody about this 'thing' at my window (apart from my mum) it still wasn't something you would forget too easily. It was art class and we had to draw a made-up creature. I thought and thought and eventually decided to draw this 'thing' a few days later when our art work had been handed in I was called to stay behind after class, where the teacher pulled out my artwork and another by different girl in our class. The 2 pictures were the same! Also the teacher was accusing me of copying this students work (I was known as a bit of a troublemaker in school so teachers seemed to suspect me first). I would probably gotten a detention if it wasn't for the fact I almost cried and was obviously shaken when I told them It was something I had seen when I was 8 outside my window. The teacher went white and dismissed me immediately.
Curiosity got the better of me a few days later so I found the girl, who had drawn this identical picture, let's call her Jane, I asked about the picture and her story matched mine. Both 8 years old same 3 scratches on the window, same description of the 'thing'. After that Jane and I became quite good friends during high school.
Now we skip a few more years.
I was 22 years old at the time living in a bedsit on the 3rd floor of this building, I had a boyfriend called martin who would come to stay at mine or I would stay at his from time to time. One day we woke up at mine switched on the TV made us coffee when out the blue martin asked me "Do you have an Imp following you?" I replied with something such as "been reading too many fairy stories have we?" Martin then explained what he had seen outside my window, he was woken up by the 3 taps on the window and had seen this 'thing' the descriptions matched up to what I had seen all those years ago. When I took a closer look at the window there were 3 scratches on the outside of the window...
Would anyone be able to give me some insight to what this thing might be?