For the last year or so I thought I'd developed a new disease: Phantom SMS Vibration Syndrome.
As I fell further and further into SMS junkiedom (especially during baseball season...I was on pace for 1000 messages last month), I'd feel my phone vibrate against my leg but have no new message when I pulled it out to check.
At first I thought it was a defect in the device, but then it would happen when my phone wasn't even in my pocket. Muscle spasms? Psychosomatic signs of addiction withdrawal? What could it be?
According to the comments in this Lifehacker post, it's not just me. Good to know I'm not alone.