What a Sweat Night!!!

One cold downpour sunday night around 10:30 pm, the light in my room was still turning on while as I am looking down outside my window, I could see my parents room's lights had turned off. The house was deserted in black dark look. I was too sleepy now, so I went to bed. I couldn'g sleep due to the sound of rainfalls ourside. The splash of zigzag lightening could be seen through my windows.

The clock striked 11pm, I was still awake. When it was about a quarter to midnight, my picture sticked to the wall fell down to the floor. At the same time, I think I did hear the sound of my parents room door opened, but i couldn't hear any move or footsteps. Just seconds after that sound, my room door burst opend! I asked, " Is there something wrong, mum?" (Ma' ak mean ka ey ma' ak?) But there wasn't any reply. Then, my eyes widely opened, I got out of my mattress and walk to the door to see who was there. BUT when I arrived at the door, everything was darkly clear and silent! Nobody was there. Suddent the hair on the back of my neck prickled, my hand and feet began to be cold as ice, and I could feel my body shivered. I was stunned and didn't know what to do. Fortunately, I was lucky cuz that night my grandma came to share a room with me, so I waked her up and tell her what had just happened. She said nothing but just told me to go back to sleep. As it was about midnight and I never stayed up so late like this, I fell asleep...

I was so so wonder because I myself have closed the door firmly and knew it is well shut! But why??? In the mornin', I got up and told my parents about the story. They said maybe there were some errors with the doorknob or something like I might not closed it well! What do you think? Can u tell me how can my room door burst open and stay ajar if no one open it???