I was quite happily reading facebook when my laptop started making a loud, scratching noise.
I immediately paniced and pulled out the power lead.
Still noisy so I pressed the power button.
The noise stopped.
I pressed the power button to turn it on again.
The noise started again.
Steve took the battery out of the back of it and I plugged it in.
It booted up fine so I shut it down and gave it back to Steve.
He put the battery back in and I plugged it back in to the mains.
It's been fine ever since!