One shall not roll head on keyboard for many reasons. 1. Because it's a WASTE of TIME 2. Number 1 wasn't enough... Okay. For prolonged periods of time it makes you dizzy 3. It may damage said keyboard 4. And four, it will probably mess up your head Please note, this article was written by a man with much experience in this field. Do call the toll free hot line at 555-0123. Thank you