Electric Shock

Well i just got electric shock , when i touched my pc few minutes ago ... It was mild shock and i am quite fine . Well when i purchased computer year and half ago , the shopkeeper also gave me iron stand where i have my computer adjusted . Normally it does not give any shock , but today i got the shock , reason is probably i did not wear anything on my feet (no shoes) and my hands were little wet with sweat (after typing a lot) ...
After that i just dried my hands and wear plastic shoes and tocuhed computer again and then it did not give me electric shock at all .
So peoples , if you have desktop at home and you have placed it somewhere else (except wooden box ) then take care following things .
1. donot touch computer with wet hands when its on .. Cause water is one of the best conductor of elecricity .
2. Also wear plastic shoes or anything made from plastic while working with computer ...
Hope you will never get electric shock from computer in your life , Good luck .