Macbook Pro Electric shock
I was using the three pronged charger and the problem occurred. I switched to the two prong charger and the problem stopped.
The electrician opened up the wall sockets and made sure the earthing wire was in the correct position. Now i can use both chargers with no problems whatsoever. BTW, i wasn't wearing shoes when it occurred.
With the advancements in Apples designs, i'm looking forward to the next models.