Bad habit

Recently one of my close friend told me that I have a habit of signing which I have never notice before. She was puzzled as well as I was known for my cheerfulness therefore she has decided to catch me whenever I signed. After a week of monitoring by her....this was the conclusion, I will signed whenever I read about some terrible news in the web (My office table was next to hers) or when I called some companies which gave some bad services.

Guess I am doing it subconsciously and I was quite stunned too when I was caught in the action and once 5 times in a day. Think I better kick this bad habit before she has decided to fine me...