when i was doing my college, i felt electric shock sometime when open water tap. That time i thought that some electric leakage. But for the 2 years, i am feeling this very often, when i get down from the bus, or when i touch door handle, i am getting small shock with spark sound, If touch the same door handle again, i am not feeling anything, But after 1 or 2 hr interval, i am feeling same shock. One day i touched my friend, both of us reliased small shock. I asked many people, but i could not find any reason. Today i got 2 spark sound in three different door in different floors in 2 hrs interval