This is a real incident experienced by me and my younger sister.
We stay with our parents on the topmost floor of our building.
I and my sister were home and along with us, were her friends, on one evening.
It was raining heavily that time. When the clock struck 8.30 pm, the lights went off.
And as it was already late for her friends, they decided to go to their respective house.
As it was very dark outside, we switched on a torch.
I and my sister Sana were standing near the lift (towards the left side are stairs to reach down) and holding the torch in such a way that enough light was flashed for her friends to descend the stairs.
As soon as her friends descended one floor, I saw someone really fat ascending the stairs.
That someone was really weird.
1) it was very fat and was climbing the stairs fast
2) from the torch light I could make out that it appeared grey
3) it was in human form but was visible just up to the waist
4) its legs were plump and despite that it managed to almost run upstairs.
I was scared yet numb. I did not speak a word and before that 'thing' could reach us, I thought of taking her to our house and lock the door.
Before I could do this, my sister pulled me and we both ran in our flat and locked the door.
When I asked her the reason of her behavior, she narrated to me exactly the same description of that fat thing or fat figure (whatever it was) and the way it was speeding towards us.
Out of curiosity I asked Sana to dial her friends' numbers and inquire about whether they came across anyone on their way while descending downstairs. To our shock both answered 'no'.