Hello Visitor... I am Mr. Nightmare and today I am gonna tell you a story which will surely give goosebumps to you.
Disclaimer : It is not my responsibility if you end up being too scary or any other uneasiness. Read at your own risk.

This is a short story but believe me it is more horrifying than other long ones.
Story:
I am 25 at the moment and this happened 3 years ago when I was 22 and studied in university. I lived away from my home and family. So, I had to earn myself and for extra money, I used to do some babysitting work also.
One morning, I got a call from a couple who asked me for babysitting of their 1 year old baby and I was surely gonna accept this because they were ready to give me enough money for the job.I accepted it and received the address an hour later. It was just for a night, so I didn't thought much about it.
When I arrived at the address I met the couple on the doorstep and I greeted them and they told me about why they are going out and wanted their baby to wait. They had to go to some sort of party which was quite far away. They also made sure that I would know everything of the baby to take good care of him. I went to the room of the baby, just to ensure that everything was good. The baby was sleeping in his cradle. I looked around and saw a clown. I mean it was a dummy and I thought it was very creepy because it seemed to be real.
I didn't pay much attention to it and thought that it must be the baby's toy. I went to the living room to watch the TV. I was kinda worried and then, I heard the baby crying loudly. It was not even 5 minutes I went there. I went to the baby's room and took care of the baby. When the baby slept, I took a look around the room and what I saw was horrifying. The clown dummy which saw was in a different position and I was sure that it wasn't in the same position as before. I was kinda worried but didn't pay much attention to it again. I went to the living room and resumed watching TV. Nearly 10 minutes later, the baby started crying again. I was kinda irritated now. I went to the room and took care of the baby. When the baby slept, the first thing that my eyes took me off was the clown. The clown was now in different position than before. This was the third time and it had moved three times. I was critically worried so I went to the living room and called the parents of the baby. I told them, "Hey, I am speaking from your house and I feel something strange is going on." The mother replied, "What's the matter." I said, "I am talking about the clown dummy in your house, I think something is wrong in it." The mother replied with an intensive tone, "Clown? Run to the baby's room now! We don't have any clown dummy in our house!"
Chills went through my spine. I was horrified. I quickly ran to the baby's room, but alas, it was too late. There was blood around the cradle which made me scream at the top of my lungs. I slowly went near to the cradle and saw the most disturbing thing in my life. The baby was dead and blood was all around his body. When I looked to the corner of the room, the clown was not there. The window was open. I got everything what have had happened. I called the police and the baby's parents. The parents weren't angry on me as I didn't knew what all was there in the baby's room.
Few days later, I got to know from the news that it was a serial killer who was in the room that day. He dressed like a clown to get close to people and kill them. Police told me that when they interrogated him, they found that he was about to kill me also. I was shocked and relieved too. I was lucky that I didn't got caught by him. Till date I feel uneasy to think about the killer clown.