i am on the last day of a documentary shoot and my camera makes a crazy noise as soon as i turn it on. the noise is similar to that of a tape rewinding and you can feel the camera body vibrate. it will stop sometimes if i point the lens directly at the ceiling, but only during that time and as soon as i bring it back down it kicks up again. it started a couple of days ago and i could solve the problem by turning it off and on again, but it has gotten worse and that no longer is a quick fix. i was hoping someone might be able to help me out....any ideas??? thanks.