> does the iPhone internally log strong vibrations sensed through the gyro/accelerometer I would lean heavily towards "yes". The why, I guess we'll never know

> does the iPhone internally log strong vibrations sensed through the gyro/accelerometer I would lean heavily towards "yes". The why, I guess we'll never know the real answer, but I remember rumours, years ago, of manufacturers denying warranty claims based on "dropped" devices thanks to the gyro data.