Hi, would like to know if you guys have experience this before? I had the adaptor plug in to charge the MBP while using the laptop. I left it plug in even after fully charged. This is where I start to experience some static on the MBP. It's not like I got a shock but more like those numbing feeling. I am not sure how to describe it but it's like some kind of vibrating effect feel when your hands are on the aluminium body? Is this normal?