Today, a friend was reassembling his MacBook Pro after performing a hard drive upgrade, and he inadvertently put a very short screw down a very long shaft. How to get it out? After much shaking and poking, I remembered I had the base from an iSight camera, which is magnetic. We put that over the hole, but it didn’t help. Finally inspiration struck: I put the iSight base on the shaft of a screwdriver, which magnetized it. The screw lifted right out. I was exceedingly pleased with myself.